Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b2ec63ed77a7fdf…

MALICIOUS

PDF

89.1 KB Created: 2021-06-28 23:51:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 941a88f72c6f2d3b1bddbebbd785df5b SHA-1: 1de9d75aee324fee6e51be86fa01860200c8f178 SHA-256: 4b2ec63ed77a7fdf25be5f6954d9832aaa3383cfbda632726061460b181b11cb
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of a QR code lure further indicates an attempt to trick users into interacting with the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d09911366db---52791099599.pdf In PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/848025697e10aa22dc2a5b8314a8bdad/56887643414.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/edcd4ef428503dc5b57d104edf0b26ec/luvegosawedewuvito.pdfIn PDF document text
    • http://mankatomnclassof71.com/clients/e/e0/e0e8961458839910853a12af65841b27/File/kifedadadeke.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16085139f2ac79---72744871473.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/9b0cd7cec34419bcf9d88ff1ba73fb78/89729276268.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160c6b4f56e41b---jisubuvitokofimikumepu.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/nopisupojomibusesidifon.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/0e89608043190f91ecbdbf6a30c3075c/kejafewepo.pdfIn PDF document text
    • https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/160734bc5ee98e---53966938937.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/fe639ad1face7df6a3e9a7c3617e66b1/luloputokenaluxinekifefob.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/kukewosigukavosivufoxizev.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/d24a2f6275cd24e3690eb19336cbba60/wipiretekifokamoniginesu.pdfIn PDF document text
    • http://brmhn.com/userfiles/file/20210514124705_yodgt5.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/fede41c71ebf9b0652de1c9be23b2ab3/sutoxelem.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160a1fec53f922---pujoborexarelibob.pdfIn PDF document text
    • http://phanphoiongnhuahoasen.vn/upload/files/labotuwajoruxaparot.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/16093aab5c9845---jasabokavagotasatutula.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c94ba11a8d1---vodinozevamonugefulujigok.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/momesukuwudonomeror.pdfIn PDF document text
    • http://xn--80aadq3ae7aa5k.xn--p1ai/upload/file/72619128826.pdfIn PDF document text
    • http://hosungtour.net/FileData/ckfinder/files/20210625_63D7A02E2AF55988.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bab57eb131c---29038322978.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/cf7b3381245f3d23a83f4ee6ebe0c01d/38902081432.pdfIn PDF document text
    • http://agrion.org/upload/fichier/wupiwutadezuton.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/ad3utm4e08hij94lsn865i5ae0/pagorojorurekipojitu.pdfIn PDF document text
    • https://mmszke.hu/files/file/zolekogesorukamutufemuvil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=project+on+mobile+banking+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF879 11160 bytes
SHA-256: 567db3e4fc62dea61941b180c9b7e3c54f582982e4ef280f6e93beb1d2f6014d
font_01_sfnt_off00011217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11217 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012a29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A29 17152 bytes
SHA-256: 80d90ae2c336e21c162b55461343bb3b5eb9a9360465a199d08e18381d029eb9

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