Malicious PDF — malware analysis report

Static analysis result for SHA-256 3518ff3d902eb79b…

MALICIOUS

PDF

66.2 KB Created: 2021-02-28 22:23:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b50f67b2ea6bfd9ba84b08e690a45568 SHA-1: c1c9020cb4599b03d41716247ccc345613aa09ca SHA-256: 3518ff3d902eb79bee16ef7910af8f149ba498d89b92d40144f8b622a49f6ba3
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the presence of numerous external URIs and the overall structure strongly indicate a phishing or malware distribution attempt.

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://gimoguvi.ru/strik?utm_term=ipod+mini+2nd+generation+manual PDF link annotation
    • https://fajasorefasox.weebly.com/uploads/1/3/4/3/134348900/b98362.pdfIn PDF document text
    • https://cdn.sqhk.co/luveruzosu/Jbiglie/livibojesebos.pdfIn PDF document text
    • http://puvepum.getenjoyment.net/fanufinoj.pdfIn PDF document text
    • https://nitipitu.weebly.com/uploads/1/3/0/7/130775162/mebebixit-lorinepew-rogosinawev-jifaborojemelul.pdfIn PDF document text
    • https://gofolepoxi.weebly.com/uploads/1/3/4/8/134882907/1766252.pdfIn PDF document text
    • http://mebovedu.getenjoyment.net/wemuzefuvokizozugijofus.pdfIn PDF document text
    • https://rakuwogu.weebly.com/uploads/1/3/4/8/134858672/9476389.pdfIn PDF document text
    • https://cdn.sqhk.co/viwiratoposu/cighhIP/sizojurevebifogerikam.pdfIn PDF document text
    • https://pexasojurez.weebly.com/uploads/1/3/1/3/131381046/5977414.pdfIn PDF document text
    • http://mizigigutafax.iblogger.org/74055718188.pdfIn PDF document text
    • http://nexofozupugasi.mywebcommunity.org/sajanix.pdfIn PDF document text
    • http://fawikenaxalu.scienceontheweb.net/63170970171.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/yAjbvha/kajojirexe.pdfIn PDF document text
    • https://cdn.sqhk.co/sipebililofo/jbXgggc/what_animal_are_you_most_like_playbuzz_quizzes.pdfIn PDF document text
    • https://paduxadoduxim.weebly.com/uploads/1/3/0/7/130775016/pojimisisele_novijaju_sopolusok.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pabewuvuxaf.onlinewebshop.net/vubebasirilusadolato.pdfIn PDF document text
    • http://nejimafalun.onlinewebshop.net/are_there_polar_bears_in_captivity.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_off0000c8ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8AD 5172 bytes
SHA-256: b84ddbdd3ba295fb4c91e9e0aab5ef2c86caf9a124a0f87d4c6c1bb1857745a5
font_01_sfnt_off0000da2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA2C 9680 bytes
SHA-256: 1d4e8628c4e82d4b632f82073388df3a4820570c7146a5285f4286749452000d

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