Malicious PDF — malware analysis report

Static analysis result for SHA-256 a150b3948bcb4692…

MALICIOUS

PDF

68.3 KB Created: 2021-01-29 23:41:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: f60f7ed59fa8331bbb64aa441dcc9b6b SHA-1: d1ce70c0e895ae011f135a14314d9b7110e4cdbe SHA-256: a150b3948bcb4692e93920689d75ae9d2ca4299419c2d301c5c1ef14a7bb462e
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The PDF contains a large number of embedded external links, indicating a link farm or phishing attempt. While no scripts were explicitly extracted, the presence of numerous external URLs suggests the document's primary purpose is to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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.
  • 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://druttle.ru/123?utm_term=royal+crosscut+shredder+1216x+costco PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4384149/normal_60006b02a17b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394072/normal_5fda387c9a8dd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495059/normal_5fcdb71159a65.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444371/normal_5fde55e14205e.pdfIn PDF document text
    • https://durajonuz.weebly.com/uploads/1/3/1/3/131383269/gepilota.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445114/normal_5fe6c64452411.pdfIn PDF document text
    • http://bitsracing.net/blue_apron_stockv7nn7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378618/normal_60045ccb66872.pdfIn PDF document text
    • https://gegiritofizupog.weebly.com/uploads/1/3/4/6/134644009/tekisa-pevanedubi.pdfIn PDF document text
    • http://girlita.space/632723923168ri3q.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470837/normal_5fffd338414f8.pdfIn PDF document text
    • https://cdn.sqhk.co/boguzivipel/jd5hgha/defender_3_mod_ios.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385859/normal_600a038831d28.pdfIn PDF document text
    • http://instapriz24.online/2.dereceden_denklemler_kolay_testtzyxe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421478/normal_5fec212e319e7.pdfIn PDF document text
    • http://findattime.com/exploration_lite_craft_apkfg4xw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ca83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA83 5544 bytes
SHA-256: f9e57eab0abe6c4bb0932a46f3fe749970a848457163b4db171a7345f938fa20
font_01_sfnt_off0000dd67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD67 11364 bytes
SHA-256: 982f5ac418a582e8b71179c7dd2e0bf6461edcf329a352ab39f9df7f2d97d2b1

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