Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae8222025f1bc617…

MALICIOUS

PDF

84.4 KB Created: 2021-10-12 15:35:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 501e661169cd42a386acfa94209342e2 SHA-1: 203b74d04e78e9a3063b39dbe3c8c2c438d97e93 SHA-256: ae8222025f1bc61795917c5e304d09e96f0f07c816cc2c588f683d4aceb97f3f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, with many URLs pointing to compromised CMS upload directories and disposable hosting. This suggests the document is designed to lure users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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.
  • 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 https://beldapromosyon.com/calisma2/files/uploads/59436462241.pdf In PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614f196253829---budobikovugapa.pdfIn PDF document text
    • http://sziszolg.hu/editor_up/xositugo.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd57b5a1ea---xeterabewak.pdfIn PDF document text
    • https://hargagila.com/uploads/image/files/dozemigu.pdfIn PDF document text
    • http://kahasat.cz/data/file/68882232806.pdfIn PDF document text
    • https://nevjegyzek.eu/uploads/file/majuwisinorumasiw.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a2d7eb495c---vogirulimobusipiwovoni.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161637bbd4bb97---83427563672.pdfIn PDF document text
    • http://fratellibeninca.com/images/file/34074256540.pdfIn PDF document text
    • https://coonvalleycc.com/userfiles/file/rokikanetulusegedewoja.pdfIn PDF document text
    • http://lorichphoto.com/pictures/file/82322114065.pdfIn PDF document text
    • https://smartmedia.ro/app/webroot/files/userfiles/files/24191461574.pdfIn PDF document text
    • http://tdjl.com/uploadfile/file///2021090605193536.pdfIn PDF document text
    • http://kingkady.com/uploadfile/files/zilumowuz.pdfIn PDF document text
    • https://www.padanguparduotuve.lt/ckfinder/userfiles/files/54904939888.pdfIn PDF document text
    • https://begili.com/uploads/image/files/22666264013.pdfIn PDF document text
    • http://nandishoverseas.com/UserFiles/File/samotedixalakupub.pdfIn PDF document text
    • http://hakasasi.id/userfiles/file/bipujavaruvujovi.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c0c011ae60---ragunola.pdfIn PDF document text
    • https://zbmbudomont.pl/userfiles/file/xajudodupasaribadujer.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/783e3cc4a2b3c485fb4f1bc94e4b5557/33217176559.pdfIn PDF document text
    • https://majubesar.info/contents/files/zubolipizuk.pdfIn PDF document text
    • http://dezmaster.com/userfiles/file/serotemolozefero.pdfIn PDF document text
    • http://www.teaterskolen-efteruddannelsen.dk/ckfinder/userfiles/files/webewu.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/RC0zOYPQW8A/uplcv?utm_term=how+do+you+get+the+woodland+mansion+map+in+minecraftPDF 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_off0000e2cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE4 11360 bytes
SHA-256: d6239337aeb6d55e3dabf495ec9c3a076a15e63e826c05ecf157091cecd8b1a7
font_02_sfnt_off0001153f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1153F 18276 bytes
SHA-256: 6470ee8df5a75b19f28e54b3f8ad629f11fa2d544b85c6b2d10fbffd71ad7ed8

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