Malicious PDF — malware analysis report

Static analysis result for SHA-256 e86848f8faaee100…

MALICIOUS

PDF

89.8 KB Created: 2021-03-25 06:34:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e684feee5d81bda4ba8fb48057e7c779 SHA-1: c18d0ee69697046a0054032b64a6486c53cfb1d1 SHA-256: e86848f8faaee1005c5445add29549378d91f510afa7ff907a261179c231fea1
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 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/strik?utm_term=epson+1430+ink+light+on PDF link annotation
    • http://sovumeriwox.mygamesonline.org/methods_of_personality_assessment_in_psychology.pdfIn PDF document text
    • https://fodubimofo.weebly.com/uploads/1/3/4/8/134884763/25912.pdfIn PDF document text
    • http://pazadixokumox.sportsontheweb.net/bearing_designation_skf.pdfIn PDF document text
    • https://cdn.sqhk.co/pajerelo/30gipja/tefasigifogekemasepubek.pdfIn PDF document text
    • https://tazugusalasuxof.weebly.com/uploads/1/3/4/5/134581133/d69c90295d91.pdfIn PDF document text
    • https://lorotorerusut.weebly.com/uploads/1/3/1/4/131452969/gasifilemowa_xaxuvok.pdfIn PDF document text
    • http://mudixefibewab.mywebcommunity.org/51083480979.pdfIn PDF document text
    • https://cdn.sqhk.co/xubipoxeguza/bZedXhc/entergy_new_orleans_phone_number.pdfIn PDF document text
    • http://liniwugo.iblogger.org/citoneurin_injetavel_bula.pdfIn PDF document text
    • http://wiwomadexuza.22web.org/59628575273.pdfIn PDF document text
    • https://cdn.sqhk.co/bavomizobe/cjigdgi/nazan.pdfIn PDF document text
    • https://beluxavin.weebly.com/uploads/1/3/4/5/134507718/kolutot-xobivoze.pdfIn PDF document text
    • http://warupipujamoru.sportsontheweb.net/9835928157.pdfIn PDF document text
    • https://cdn.sqhk.co/xejadukoxeta/fVjgEiK/68225861562.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://9d349da1-218b-4b59-9e37-2a90cab56d40.filesusr.com/ugd/de9003_0a5eac6ac5bf4ed79721ca6e4679ab22.pdf?index=trueIn PDF document text
    • https://1a6c606f-1efd-495f-9370-57f425d809fd.filesusr.com/ugd/1be480_eafb5a63334d4747b5586b6fc1715ab7.pdf?index=trueIn PDF document text
    • http://nedajazamofo.epizy.com/96187789318.pdfIn PDF document text
    • http://povalimokuwov.rf.gd/e_magazine_legal.pdfIn PDF document text
    • http://mafokesa.onlinewebshop.net/pemisozejikokezesibi.pdfIn PDF document text
    • https://6ec3981f-6443-463b-a164-91fc69f101d9.filesusr.com/ugd/7603ae_85b77846d1fe4336b96f721b601f35b2.pdf?index=trueIn PDF document text
    • https://8c4778c4-ed17-4cf1-86f9-5448e21c5c15.filesusr.com/ugd/6da380_6a195d40d1034a558912148a691f8615.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11449 4912 bytes
SHA-256: 7d1f06405a10a1103bc87a2b269e5f20c15d61736adbb6a188536a8f8308f0da
font_01_sfnt_off00012503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12503 11304 bytes
SHA-256: a7b9b81f71104616e5a6a355147fcacf50ad1daeb42b426ccc06535eabf8509a
font_02_sfnt_off00014bc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BC0 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3