Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c77813206c30087…

MALICIOUS

PDF

73.0 KB Created: 2021-02-27 01:28:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d095f2c766ded4b6969381b6785042d3 SHA-1: 142a88e81eb07c578b4e2f14fabbd80603d866de SHA-256: 6c77813206c30087c8b193552c4b8c4417d8f5f70167b819f09e0b004737b747
146 Risk Score

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 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/wix?keyword=properties+of+equality+worksheet+6th+grade PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385848/normal_60255eafcddca.pdfIn PDF document text
    • https://fitepavi.weebly.com/uploads/1/3/4/4/134485464/4284553.pdfIn PDF document text
    • https://gasibikame.weebly.com/uploads/1/3/2/8/132814219/50ac8.pdfIn PDF document text
    • http://sugameloxufe.mywebcommunity.org/what_do_debits_and_credits_mean_in_accounting.pdfIn PDF document text
    • http://fumexijana.getenjoyment.net/panasonic_6.0_plus_cordless_phone_battery.pdfIn PDF document text
    • https://zalivibutadugaf.weebly.com/uploads/1/3/5/3/135391941/bowojosikonajuvamiki.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420602/normal_5ffb48f65955f.pdfIn PDF document text
    • http://gadetebes.sportsontheweb.net/icom_ic_207h_programming_software.pdfIn PDF document text
    • https://biwawidojimu.weebly.com/uploads/1/3/4/6/134648839/pirituxagivukox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366009/normal_5ffcd3ab18ec5.pdfIn PDF document text
    • http://xemokajoled.medianewsonline.com/ninja_300_service_cost.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447464/normal_5fd8393848617.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lumosaneja.onlinewebshop.net/descargar_manual_de_funciones_excel_completo_gratis.pdfIn PDF document text
    • http://ruxuwidoke.epizy.com/30238471641.pdfIn PDF document text
    • http://zuxokoberibaw.atwebpages.com/32171795369.pdfIn PDF document text
    • http://tekaxebabix.epizy.com/eotech_hws_512_review.pdfIn PDF document text
    • http://jabaxuzadowepep.rf.gd/42881324968.pdfIn PDF document text
    • http://bolilolu.epizy.com/albanian_to_english_worksheets.pdfIn PDF document text
    • http://litorow.myartsonline.com/38393037345.pdfIn PDF document text
    • http://popeganezawojeg.rf.gd/22860469024.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_off0000d396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD396 2852 bytes
SHA-256: 07dadd50606e062a86d822ef0a2aa45b7adb1538999962c5ba4165b0bd58a839
font_01_sfnt_off0000df8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF8A 5844 bytes
SHA-256: 47e93a9378ca1ecb739d5661995cba28c2b9b30454f2e1d6fafdc7c89a00a31e
font_02_sfnt_off0000f379.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF379 10212 bytes
SHA-256: d877f47e9ae36a786a45e5d1737206af478475500de27c03c81ea06711e6c763