Malicious PDF — malware analysis report

Static analysis result for SHA-256 384feb74ec6c0517…

MALICIOUS

PDF

80.1 KB Created: 2021-02-20 19:58:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b82eb9e204f5f1e5ec38d2608d76c4d3 SHA-1: e695f8bbe09420948cd4da4c6dfe65c4620c8aba SHA-256: 384feb74ec6c051731d7e1a54a72f22ed394dd78c41487eeec306b6818779f74
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a significant number pointing to potentially malicious domains, indicative of a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are commonly used to redirect users to malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://baarspo.ru/123?utm_term=how+to+activate+your+glutes+while+standing PDF link annotation
    • http://xutarima.22web.org/zefedukote.pdfIn PDF document text
    • http://braco.ru/traffic_signs_worksheetme6uf.pdfIn PDF document text
    • http://kpupnov.pro/fijuruwijowedibowogwu7mk.pdfIn PDF document text
    • https://xowasesulozuvuv.weebly.com/uploads/1/3/5/3/135347394/jomexidiva.pdfIn PDF document text
    • https://botakukejase.weebly.com/uploads/1/3/4/6/134610266/manirezajux.pdfIn PDF document text
    • http://jilet1.club/cities_skylines_parking_garagen5tdq.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/veraxawewib/allstar_performance_brake_bleeder_bottle.pdfIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/34418796300.pdfIn PDF document text
    • http://timonuxe.rf.gd/xosovar.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/watson-_glaser_critical_thinking_skills_test.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/jorejenixevul.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/dukazeragufuwid.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/calendario_mundial_rusia_2018_colombia.pdfIn PDF document text
    • https://s3.amazonaws.com/gopifu/lawibumosevuxujixovomide.pdfIn PDF document text
    • http://moniladipawi.epizy.com/60423746986.pdfIn PDF document text
    • http://zorogeloma.epizy.com/zegatuserisup.pdfIn PDF document text
    • http://badivisixeg.epizy.com/pacman_flash_game.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/sevufeta.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_off0000ee0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0E 5300 bytes
SHA-256: 6fd87b4bcce3cc552eb4a41e2416801df8af4b4a0c62910840a16aee8b3f91f6
font_01_sfnt_off0001001a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1001A 11044 bytes
SHA-256: 366de5bef5e7be3a8c56590765f66d2b1e3bd8c5e5a7c60b0362f0555d90c96c
font_02_sfnt_off00012487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12487 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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