Malicious PDF — malware analysis report

Static analysis result for SHA-256 2049f74a526df650…

MALICIOUS

PDF

79.6 KB Created: 2021-09-22 14:19:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: b72362cc6e362d669bd261f2797a0eff SHA-1: abb3adefad57db20e41b5543ae406ac193265a6a SHA-256: 2049f74a526df650ed92c54122e191ee7526dfbb06eba4fe543c5adca41d754b
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The presence of a QR code lure heuristic further supports the phishing or redirection attack pattern. No scripts were extracted, but the overall structure and URL distribution strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://ricoconsultingattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fivitiv.pdf In PDF document text
    • http://netmutum.com/userfiles/file/20814216708.pdfIn PDF document text
    • http://farmaciafasolis.eu/userfiles/files/41025712399.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/ladejutijabetilupalejej.pdfIn PDF document text
    • https://riwg.in/userfiles/file/7282530028.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1612e9add1b20d---kozovezijabo.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/3e89f30a7c0ec3f2687a273c47f65435/lalirerewuminowime.pdfIn PDF document text
    • http://ulv-fogger.es/d/files/78309077574.pdfIn PDF document text
    • https://geelaboba.dswip.com/ci/userfiles/files/wosemorusube.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/menadigaka.pdfIn PDF document text
    • https://zzhqhi.com/d/files/782345976.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/fojoxejadaboxe.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/45c7192a38c02fdd2433e099e9c45c75/25064300506.pdfIn PDF document text
    • http://etpatatietpatata.com/userfiles/files/9866931666.pdfIn PDF document text
    • https://truonggiangcompany.com/userfiles/file/50213716987.pdfIn PDF document text
    • https://mbzgogo.xyz/web/img/podborky/files/59200408516.pdfIn PDF document text
    • http://rowerowaszkola.pl/imgturysta/files/zakimutovavu.pdfIn PDF document text
    • http://kurier48.pl/files/userfiles/file/pejurajumanonabazasun.pdfIn PDF document text
    • https://robertbah.si/files/file/xaridoxinazutabodawewubew.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133582083783---gemabenagidezenepaxatoreb.pdfIn PDF document text
    • https://himalayanthailand.com/image/upload/File/83320013938.pdfIn PDF document text
    • https://ietc-oman.com/userfiles/files/68521714650.pdfIn PDF document text
    • https://chrmglobal.com/userfiles/file/pusixubilukigogabowiwipe.pdfIn PDF document text
    • http://squarcialupirelaxinchianti.com/writable/public/userfiles/file/62798601402.pdfIn PDF document text
    • http://daglichtfilters.nl/ckfinder/userfiles/files/10739609445.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=imo+app+new+versionPDF 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_off0000d25d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD25D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ea74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA74 10372 bytes
SHA-256: cda6faf848fe31978e25b1aa1871ccb2076735466fc565df1ab77e873c63ccc8
font_02_sfnt_off000101e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E3 17944 bytes
SHA-256: c8963d00c653fd5eef46fcce6d05a3a15642a891b6dc7cf5f5a0839d807083ab

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