Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e0b7bfedf006d53…

MALICIOUS

PDF

78.1 KB Created: 2021-04-26 01:29:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3901b1dc73ebd44b484abbe3b0b5f9f6 SHA-1: 271c08184e88360f7563e8b5a834ba21293f1b8f SHA-256: 5e0b7bfedf006d53c9bcddad9d41b810e493eed7a1a7429d4c017f5b0e843007
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URIs point towards an attempt to leverage web content for malicious purposes.

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://maypoin.ru/strik?utm_term=how+to+change+bob+stroller+tire PDF link annotation
    • http://help-igcopyright.xyz/vekarivezujivitavuxijokuj893b.pdfIn PDF document text
    • http://xafopawiki.medianewsonline.com/fufepujapedupibufewebo.pdfIn PDF document text
    • http://fivadoguna.medianewsonline.com/89861743569.pdfIn PDF document text
    • http://eliyalte.com/2231296731025r4x.pdfIn PDF document text
    • http://kazotapojiwi.mywebcommunity.org/bangla_book_class_11.pdfIn PDF document text
    • http://wijasagasipode.getenjoyment.net/rekobaxu.pdfIn PDF document text
    • http://datingsexchat.site/13192798636kc0p.pdfIn PDF document text
    • http://santaparker.store/sanilezujeriqd51f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://141ebdc9-a3c9-4c6d-b8f9-366dbf139dec.filesusr.com/ugd/46bfb0_57671d742d994feb92ec05738a8f0289.pdf?index=trueIn PDF document text
    • http://wikiwujekuloxok.rf.gd/manual_novo_cadweb.pdfIn PDF document text
    • https://58960a86-a3f4-42d8-866e-ee2cf32068b1.filesusr.com/ugd/1ad962_adc89e93f3d84116ae06fe4eea691808.pdf?index=trueIn PDF document text
    • http://joxumokuri.epizy.com/gigatunewex.pdfIn PDF document text
    • http://sajatuvireguta.atwebpages.com/sentence_structures_worksheets.pdfIn PDF document text
    • https://beca70af-11ea-46d2-a649-d7fd44c468ee.filesusr.com/ugd/dd41e2_a9b496148d15438c879b944dad1258b8.pdf?index=trueIn PDF document text
    • https://f84ffea9-2755-49c2-9cb5-47ca8b55fe65.filesusr.com/ugd/0adedf_42767ad7ffa64a2f861bff3b6e84da7a.pdf?index=trueIn PDF document text
    • https://dbba0f06-1911-40f0-8c80-a2638c7f81cc.filesusr.com/ugd/b13fd1_b8ed6d3625694ee18630b8201c7e018a.pdf?index=trueIn PDF document text
    • http://sijadogif.atwebpages.com/86118197806.pdfIn PDF document text
    • https://d6b7b3c7-8429-4d82-9d75-5d5d09e763cc.filesusr.com/ugd/a8c229_b14d6a97ff464b44a6c62cc8112483ba.pdf?index=trueIn PDF document text
    • https://c84d532c-3b33-47d6-96aa-4134a1164eb1.filesusr.com/ugd/6d45f6_5e4709f7155e4dc9ac15e59df7d76bda.pdf?index=trueIn PDF document text
    • https://a179b4bb-f9e1-4b0b-8685-f881d2afde68.filesusr.com/ugd/0fdb6d_ac88758c568245c5a2d79dfa9feab31d.pdf?index=trueIn 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_off0000f549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF549 5252 bytes
SHA-256: 9d4554f36dcda9315add0e4012f5e8514dbd1c944f87d7153cbdad3a2f231c7b
font_01_sfnt_off00010733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10733 10504 bytes
SHA-256: ca96ff4457a2d8192f31c22a4c2f2aaeecfcb2241ced1ca61d8a22fc12e1ef49