Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac6fcc240cddd992…

MALICIOUS

PDF

79.7 KB Created: 2021-03-27 14:29:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7df4f7b647bc164bf39634699816e600 SHA-1: 116f9113f221e3fe2bde9edd58bc751d5a6dea3a SHA-256: ac6fcc240cddd99279ff7498806caea9dcbf91452d087d93279675d2f15534e9
146 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://golowaki.ru/award?keyword=application+for+us+passport+renewal+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4420037/normal_60051fd0a3ab0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388841/normal_604da81a67c4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384639/normal_60192538108e1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469827/normal_5ff88c3b5d66d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383689/normal_601d7815a618c.pdfIn PDF document text
    • http://kufigada.22web.org/innisfree_skin_clinic_mask_sheet.pdfIn PDF document text
    • http://zelopaqq.xyz/90431975976nhwua.pdfIn PDF document text
    • http://xowimixipivup.22web.org/how_to_program_2016_buick_lacrosse_key_fob.pdfIn PDF document text
    • http://lordtrans.ru/mechanical_behavior_of_materials_2nd_edition_solution_manualvd94o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409840/normal_60461cf002b50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456399/normal_603bc1928285a.pdfIn PDF document text
    • http://lalashoppen.online/pioneer_sx-950_valuei0xnq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369329/normal_6005a7fe4a948.pdfIn PDF document text
    • http://nonretloli.site/48472285745nguy0.pdfIn PDF document text
    • http://axecheat1.xyz/integral_calculus_word_problems_with_answersu6vqw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fixararololu/25569422177.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/ethical_dilemma_in_business_ethics.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/kujesubulawa.pdfIn PDF document text
    • http://nuwadolonopip.onlinewebshop.net/gesto_do_risco_de_crdito.pdfIn PDF document text
    • http://vebusatoro.atwebpages.com/catalogo_eudora_junho_2020.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEB 5112 bytes
SHA-256: d375baedf1bbf8e62bd4a6db367daf602203b2fe6380ee1f650aecc6addb596b
font_01_sfnt_off0000fd64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD64 11352 bytes
SHA-256: 766f56bf8a913181d1cec5febfa0418da04a73d775f69c66061bd2d407523a55
font_02_sfnt_off00012386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12386 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

Open this report in the interactive analyzer, or submit your own file for analysis.