Malicious PDF — malware analysis report

Static analysis result for SHA-256 d617af28ecc4be9b…

MALICIOUS

PDF

86.3 KB Created: 2021-09-18 06:45:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3e822bf9e6ead0c96f3a06d52a4c818b SHA-1: bbb6ea992fe3ff9407db16970b97c9df315939e9 SHA-256: d617af28ecc4be9b76a01ee11ffe3c91f6d146df2624da725427a9889fa5ea77
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The 'SE_ENABLE_LURE' heuristic indicates the document likely instructs the user to enable macros or editing, a common tactic for malware droppers to bypass security measures and download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://garglob.ru/uplcv?utm_term=combine+multiple+excel+sheets+into+one+pdf+vba PDF link annotation
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/7298b9ae0ca92c65a34b8ef9d76ebb09/janof.pdfIn PDF document text
    • http://nemeckystrakac.sk/editor_uploads/files/komumiruwodumasosuloxumi.pdfIn PDF document text
    • http://synfarm.com/upload/files/84964250315.pdfIn PDF document text
    • http://slovbau.sk/test/userfiles/file/74412100683.pdfIn PDF document text
    • https://alternatifhirdavat.com/upload/ckfinder/files/tejiborofoxoxabaxosuj.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1613f34756f96c---89546588426.pdfIn PDF document text
    • http://atomiccm.com/userfiles/files/18368949671.pdfIn PDF document text
    • http://dycelife.com/userfiles/file/muluvedujijidovesu.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ab163734bf---14351591773.pdfIn PDF document text
    • https://apgr.eu/UserFiles/file/55554002302.pdfIn PDF document text
    • http://ambcavallon.eu/userfiles/files/vaxexelokaxofabalitofakaw.pdfIn PDF document text
    • https://medarbindia.org/ckfinder/userfiles/files/dejosugotozotuwuwebe.pdfIn PDF document text
    • https://spyboarcams.com/files/wivuguxal.pdfIn PDF document text
    • http://www.investinwielkopolska.pl/application/lib/ckfinder/userfiles/files/lixavazazugi.pdfIn PDF document text
    • http://erainbowrealty.com/userfiles/file/55132541037.pdfIn PDF document text
    • http://bdsps.org/slbdavbatala/userfiles/file/22181316349.pdfIn PDF document text
    • https://armature.ir/cache/fck_files/file/maxodimafawijijirupopuga.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/3b966b455f795ea62a537b5a08ff3aba/zoxowelibezukewepikemogu.pdfIn PDF document text
    • http://93564497.com/userfiles/46671160791.pdfIn PDF document text
    • https://mebelihome.ru/upload_picture/tezugix.pdfIn PDF document text
    • http://synagoge-stommeln.de/ckfinder/userfiles/files/53924177022.pdfIn PDF document text
    • https://estatecambodia.com/htdocs/cljr/data/files/jubebirabiwoz.pdfIn PDF document text
    • https://biomedchita.ru/imeg_master/file/581495836.pdfIn PDF document text
    • https://www.scmsgroup.org/ckfinder/userfiles/files/93755695659.pdfIn PDF document text
    • http://giovanninociti.com/userfiles/files/25238656066.pdfIn PDF document text
    • 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_off0000eb9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9C 11224 bytes
SHA-256: eb44f49c6498f43c0bf74f740a9cae0bebf84ee98ab6fa0d8d5d7f076c554c94
font_01_sfnt_off0001058d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1058D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D9F 17468 bytes
SHA-256: 593929da68266f04ea7d5d2936144a755e8080fa407cb398351f5f362b3355e3