Malicious PDF — malware analysis report

Static analysis result for SHA-256 40aa8b1f2e43f458…

MALICIOUS

PDF

73.0 KB Created: 2021-02-16 21:33:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 96c427674357aec6fb941f1136f6daec SHA-1: 7ab4a1c5e1629550c1498f62745a377263596934 SHA-256: 40aa8b1f2e43f4587c1a742abb7d1a290f24ee3f8a0b46198bd8812c2d486f6d
186 Risk Score

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://bologen.ru/wix?keyword=focus+farm+guide+warframe PDF link annotation
    • https://kadibunafi.weebly.com/uploads/1/3/0/9/130969561/05f730cb5.pdfIn PDF document text
    • https://xawizavikerid.weebly.com/uploads/1/3/4/5/134525990/2274692.pdfIn PDF document text
    • https://wubinuju.weebly.com/uploads/1/3/4/6/134642725/2582951.pdfIn PDF document text
    • https://tabivivefevevu.weebly.com/uploads/1/3/4/8/134889686/tasudodil-murew-toxenudul-xigiluvusex.pdfIn PDF document text
    • https://depasosuva.weebly.com/uploads/1/3/4/4/134483816/3244265.pdfIn PDF document text
    • https://xesusilinani.weebly.com/uploads/1/3/0/8/130874458/c2874495e434e8e.pdfIn PDF document text
    • https://wibosopepizasu.weebly.com/uploads/1/3/4/3/134332643/3681731.pdfIn PDF document text
    • https://mewurotimopu.weebly.com/uploads/1/3/1/3/131381658/75c973.pdfIn PDF document text
    • https://labajamipudoxa.weebly.com/uploads/1/3/5/3/135399896/6861377.pdfIn PDF document text
    • https://durafozo.weebly.com/uploads/1/3/0/7/130740533/xazaj.pdfIn PDF document text
    • https://puzilefamurujuz.weebly.com/uploads/1/3/2/7/132712080/fb0a572.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mupopeseri.rf.gd/8_parts_of_speech_quiz_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/agreed_ways_of_reporting_confrontation.pdfIn PDF document text
    • http://kepepisex.epizy.com/piwebaxawatipuvosoraga.pdfIn PDF document text
    • https://s3.amazonaws.com/zubata/fafebezigorewokigepuxe.pdfIn PDF document text
    • http://gigezevozaf.epizy.com/48274844958.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/icivics_answers_rule_of_law.pdfIn PDF document text
    • http://jesebikalag.epizy.com/affirmative_and_negative_sentences_exercises.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e07d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE07D 5356 bytes
SHA-256: c9ea44725e82ac205b71bdf310eae5f56c3ac825c971c4122b05ab84a0cdd108
font_01_sfnt_off0000f2b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B4 10612 bytes
SHA-256: bffa16b1f10016853bb2a79c35bc6b2fc66ea36e4756dcc2e63201a4a9005d7d

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