Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d10ae9c883e3ef0…

MALICIOUS

PDF

74.4 KB Created: 2020-12-17 19:18:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 76786adab1dc0ab0521054ce2c346270 SHA-1: baddb64892bad16686a0b1189b41b544e671dbe1 SHA-256: 1d10ae9c883e3ef002f03b7d284383b3109e7050b1494a3cb040c1e4c9c86192
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicate this malicious intent. The ML classifier and ClamAV detection further confirm its malicious nature, likely serving as a phishing lure or a downloader for further payloads.

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://traffine.ru/strik?utm_term=metroid+2+manual+pdf PDF link annotation
    • https://jabuvevakeg.weebly.com/uploads/1/3/4/6/134685488/xogumotefewotasikizi.pdfIn PDF document text
    • https://fobewesepujub.weebly.com/uploads/1/3/2/3/132303403/lowobat.pdfIn PDF document text
    • https://woviximanikiz.weebly.com/uploads/1/3/4/6/134693880/febomonuxiro-pawugitujuporo.pdfIn PDF document text
    • https://gokopawe.weebly.com/uploads/1/3/4/4/134493337/b94e1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386829/normal_5fd68e22c38ee.pdfIn PDF document text
    • https://levapexufusetij.weebly.com/uploads/1/3/4/9/134904519/70a41605b033b.pdfIn PDF document text
    • https://lopetumidola.weebly.com/uploads/1/3/3/9/133989387/1532572.pdfIn PDF document text
    • https://pujuwofox.weebly.com/uploads/1/3/4/8/134882524/c65f18a2ec3.pdfIn PDF document text
    • https://gepavemu.weebly.com/uploads/1/3/4/8/134861499/4d68499355cbdd4.pdfIn PDF document text
    • https://juladuwupib.weebly.com/uploads/1/3/4/7/134763366/721276.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb7f00ea-5af4-4586-b9d1-7a6841ef339d/nurowikufid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53fa1c40-4256-488a-94c1-4f53cc6631bb/68718125607.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc64e12a8793968642cefca/t/5fcb133b85bc3a28a6047aa3/1607144252346/ufo_enemy_unknown_manual.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5EB 5148 bytes
SHA-256: a67059ea638a08db0623e54909df91dc3bf34a40bc7462f46ed7ba00b0dd1b3c
font_01_sfnt_off0000f75f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF75F 11028 bytes
SHA-256: 6b540e5a041608a07c45873a6e106645303976b79261e21fb3244604dfdbc96a

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