Malicious PDF — malware analysis report

Static analysis result for SHA-256 208de468f24dafdd…

MALICIOUS

PDF

68.4 KB Created: 2021-04-02 18:18:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: dfb41d8696ea97891d0c2fc559f13106 SHA-1: a4e67810a680495a398f96e9ff04a12c1d7f8836 SHA-256: 208de468f24dafddceeef3ceddd629c8fa4f61df4a0cdd28e5b931a49ce66dfd
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, indicating a link farm. The ML classifier and ClamAV detections strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://druttle.ru/strik?utm_term=intersecting+chords+secants+and+tangents+worksheet+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370746/normal_60449224288e5.pdfIn PDF document text
    • https://weduparazibad.weebly.com/uploads/1/3/4/7/134710999/473767f8f4.pdfIn PDF document text
    • https://robigatif.weebly.com/uploads/1/3/0/8/130873787/a21833757b1409.pdfIn PDF document text
    • http://fesadivu.iblogger.org/fugejij.pdfIn PDF document text
    • http://keligekixebar.22web.org/losofelesufi.pdfIn PDF document text
    • http://rukunikuxajosog.22web.org/23002230322.pdfIn PDF document text
    • https://wevubajapema.weebly.com/uploads/1/3/5/9/135958203/fojagubisowite-jotabedeb-gugiduripuwemu-xozowi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408482/normal_602b73fce3f4d.pdfIn PDF document text
    • http://memexeti.66ghz.com/5929419771.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490534/normal_605831a4cba6f.pdfIn PDF document text
    • https://sefezepijimife.weebly.com/uploads/1/3/4/7/134733313/74ab9303d8db349.pdfIn PDF document text
    • https://peniwifagupe.weebly.com/uploads/1/3/0/7/130738894/fanama-vutifogezo.pdfIn PDF document text
    • https://dowanudamedi.weebly.com/uploads/1/3/1/3/131398164/35ba4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371788/normal_6035dd191067f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rozasazi.epizy.com/aldea_global_concepto.pdfIn PDF document text
    • http://pebejokepekizuz.rf.gd/70024328801.pdfIn PDF document text
    • https://5dfb2dbd-6c80-4a99-afab-57dcddd938ef.filesusr.com/ugd/79d40d_209b2909f28c49dc90ee743bfea9e98e.pdf?index=trueIn PDF document text
    • https://4cf6c2b4-cd84-4b73-83b1-bf7f441162b2.filesusr.com/ugd/e50c99_43998b6ee06b42bab65d020ac64b4405.pdf?index=trueIn PDF document text
    • https://598a1783-db1d-4ebb-96f5-d3ad23e1e090.filesusr.com/ugd/ae99eb_b2acbf4838a7444693e1027a7577d498.pdf?index=trueIn PDF document text
    • http://dixabaxoji.epizy.com/animatron_studio_pro_plan.pdfIn PDF document text
    • http://sobavetugobi.epizy.com/what_does_service_rsc_mean.pdfIn PDF document text
    • http://ravigokabuf.rf.gd/tofezudu.pdfIn PDF document text
    • http://susugafof.epizy.com/vowideku.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_off0000cdd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDD5 5260 bytes
SHA-256: 8303b9bcfb5014dee75765b156df9225767a49fc9df71b15cd90a508901b5010
font_01_sfnt_off0000dfc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC6 10516 bytes
SHA-256: 583bb441e44db07921da945622aeaa8ffee71c00eec78a965d48cd6ea17b2136