Malicious PDF — malware analysis report

Static analysis result for SHA-256 d21211f4b1903a25…

MALICIOUS

PDF

82.2 KB Created: 2021-02-10 09:46:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e06c062f7864bd9b8338f34d837ffac7 SHA-1: 9fd93ada8707e149fc74e7482d40a2999c5737a3 SHA-256: d21211f4b1903a25482bc9b28cbbb139e3bd8579e595d3a89db7ab9942d6b3d9
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://bologen.ru/aws?utm_term=2d+euclidean+distance+transforms+a+comparative+survey PDF link annotation
    • https://cdn.sqhk.co/tavimuxeju/geiiahb/kits_para_dream_league_soccer_2020_liverpool.pdfIn PDF document text
    • https://buzijivugaza.weebly.com/uploads/1/3/4/7/134709386/098aab661.pdfIn PDF document text
    • https://cdn.sqhk.co/tagisaxozof/gl1geal/off_road_racing_cars.pdfIn PDF document text
    • https://cdn.sqhk.co/jiloduvunilu/jiYGHpO/zumoxusepilelazuvi.pdfIn PDF document text
    • https://zunijitulizi.weebly.com/uploads/1/3/5/3/135305500/kibumobapisasuk-surewut.pdfIn PDF document text
    • https://folozulo.weebly.com/uploads/1/3/5/3/135351090/lawep-luzugejaleja-forozol.pdfIn PDF document text
    • https://zivadufo.weebly.com/uploads/1/3/0/8/130874541/f8ab271578b2.pdfIn PDF document text
    • https://ruzuwigowan.weebly.com/uploads/1/3/1/4/131453288/6333599.pdfIn PDF document text
    • https://cdn.sqhk.co/vorowobenune/ibXjahg/easy_baking_recipes_desserts_cake.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvajuvewuj/jfxgcyq/27630135165.pdfIn PDF document text
    • https://resagivet.weebly.com/uploads/1/3/1/3/131383325/385ef.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzuvazol/kjridic/90749377007.pdfIn PDF document text
    • https://cdn.sqhk.co/jomonufo/giogchb/smash_balloon_social_photo_feed_demo.pdfIn PDF document text
    • https://rezezeveg.weebly.com/uploads/1/3/1/8/131871466/nomid.pdfIn PDF document text
    • https://cdn.sqhk.co/xixujipum/J5Aghet/marxism_theory_for_dummies.pdfIn PDF document text
    • https://cdn.sqhk.co/nunewole/ii2hfvP/95078352662.pdfIn PDF document text
    • https://rodubimalutavos.weebly.com/uploads/1/3/2/6/132695690/tixuzi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/mipizaju/porsche_cayenne_turbo_performance_chip.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f39e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF39E 5384 bytes
SHA-256: 81fd8cbe62b793b4c4ab35c86749682e06bc6a5e408ca98a734bdc4165647454
font_01_sfnt_off000105d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D1 12288 bytes
SHA-256: ec08dcd4b5fe1b7b3062544ede0e9cc37ca49d7fef78028029907c5bf6ad23e2
font_02_sfnt_off00012cb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CB9 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

Open this report in the interactive analyzer, or submit your own file for analysis.