Malicious PDF — malware analysis report

Static analysis result for SHA-256 91779879826cd758…

MALICIOUS

PDF

90.8 KB Created: 2021-07-15 22:43:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9fe91cf2f2cd50a89ae4169fac306620 SHA-1: 075c5d16faeb3643b95276e0a880c69655fc4f12 SHA-256: 91779879826cd7582e169266d353aeb5e047fc4579fc1336f81f0784ff37d39e
196 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of an advance-fee scam. It contains numerous links, many pointing to compromised CMS upload storage, designed to lure victims into fraudulent schemes. The document's structure and embedded links strongly suggest a phishing attempt to extract money or personal information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/9d01a198fb331fa74748c3a5ed6ca5b2/69801941160.pdf
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160788d94b2ea4---xanovubabukalulokikexinu.pdf
    • https://kogan-photo.ru/wp-content/plugins/super-forms/uploads/php/files/487762a5e7691f8f6fdaad7da262f804/xijugesatibemajija.pdf
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/nm3dicuu6vjnmeida5q43ta1p1/rujabameduvugonipinotop.pdf
    • http://eatatrudy.com/uploads/files/19912367001.pdf
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/66887299648.pdf
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609fe49f63cb9---74409474772.pdf
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a01f9bcf182---5613801044.pdf
    • http://csc010.com/userfiles/file/20210623152100_wd8e0n.pdf
    • http://sys-svinding.dk/userfiles/file/88293717418.pdf
    • http://antichigelsi.it/userfiles/files/fukidigodezopivo.pdf
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1b2c449809---69800046416.pdf
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608402aa43b7a---9048444540.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/s2o2sunk6t7ii3hbl3tf85e6h7/39892475083.pdf
    • http://bielwod.com/userfiles/file/kejidisomafutasapu.pdf
    • http://keifo.ru/ckfinder/userfiles/files/kafofejapeloneduxisa.pdf
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607798108499d---20896816089.pdf
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/9014711278a39b50353f6d793fea301f/zuwitoguvujadev.pdf
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609416f292d55---fedevodubavogadukis.pdf
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609b3bb44ef8b---pibagijeso.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608899996af9b---86875445666.pdf
    • http://cucthongke.vn/userfiles/file///51150674582.pdf
    • http://yournamebadges.com/withyourdog/cms_uploads/file/faraxorurekujo.pdf
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/50f2b14b06b09460e4659eb90d063d24/54389164872.pdf
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b1e688de1b4---suwijanerawitaxufinovux.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=countif+not+equal+to+zero
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd5e.bin
d2f44f8bb0cb5fd0de552547d2dcc6a28110b42d330145818e759e0fdc281210
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5E 18236 bytes
font_01_sfnt_off00012da8.bin
3376c3c74b7ad7247c92304cb316afa0e2ec4506d579b23d6b8f12f7346e177b
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DA8 10376 bytes
font_02_sfnt_off00014550.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14550 16792 bytes