Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ade85a992f9ca2a…

MALICIOUS

PDF

104.7 KB Created: 2021-07-06 21:33:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: a2c08b3b877ea8c424296251eadc64f0 SHA-1: 801bbffea245529234b3017d69416379a5121e88 SHA-256: 2ade85a992f9ca2a41af36137e84c54cc319f6558db169ac3ca9a484af48f054
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous URLs pointing to compromised WordPress sites and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity, likely serving as a lure for users to download further payloads or provide sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://oniceh.ru/uplcv?utm_term=hitman+2+silent+assassin+apk+download+for+android PDF link annotation
    • http://laweasy.kr/userfiles/file/mumuxatizanomapoxaxa.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/40180323902.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/160788104d4055---63268132226.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607082776ca5f---7954045171.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160942651719e2---gebikixalusememuvotif.pdfIn PDF document text
    • https://mm-podium.ro/userfiles/file/nusumomowororojuvuvuxi.pdfIn PDF document text
    • http://bsbcarpet.com/userfiles/file/903121751.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079efb26c35e---bugora.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/vblsifln6cpj77q3dnvea2vlm5/lerividezawu.pdfIn PDF document text
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/1ef7f1180baa44cedb4e266c62446e50/ritizosifixagod.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5ac8cbefa---vofopigixatanirofuman.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/017srqgoierpm3q2b9a5if77f6/nukazumujesexifewokagupe.pdfIn PDF document text
    • http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/p2vk0q0j79rn2pqbflpu2o6ga6/kabenakuvorawusapewiv.pdfIn PDF document text
    • http://littlepearlbooks.in/data/eimages/file/47708896438.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/nalofutizukefitejuzedezu.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/0974ef18b91e594d58abd7e60bc4e35b/87512955251.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/f23d5bf908ea01f969b9c7ea4ccaa923/95154525052.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/16097df5ab31e8---19331910912.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f9708d97f---sisof.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ecd01ba4ed---jidodopipezixiresoxonite.pdfIn PDF document text
    • http://panziofabian.hu/fck_kepek/segukisufipotuvebivanigu.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160a0fb6029edc---13032474627.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_off00013620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13620 17448 bytes
SHA-256: 2063dfd0b31c04a3ead17a8ea3808ac9df0a7f7ca55983514f6b278e48345221
font_01_sfnt_off00016401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16401 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00017c18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C18 10948 bytes
SHA-256: 113dfeb808476ff0cef4de3bb316a93b59f8c04ff937daae9f9bf79bf977a572

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