Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c68c60d41a5c7cd…

MALICIOUS

PDF

79.7 KB Created: 2021-03-30 16:04:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 395fe844453152aa6ca884ba88b36b78 SHA-1: 6c75ba944443c1f0a5305710bda92b5ae95d8dec SHA-256: 8c68c60d41a5c7cdd61158bff21bc7c66f538bee102d082b28cf6619d966cf6e
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized to appear as legitimate documents, a common tactic for link farms and phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded URLs suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://botokaw.ru/award?keyword=business+plan+sample+pdf+kenya PDF link annotation
    • http://silatapejix.iblogger.org/barbara_cartland_download.pdfIn PDF document text
    • https://cdn.sqhk.co/nulegudup/die2Sjh/xomoluwusekiduwudilub.pdfIn PDF document text
    • https://cdn.sqhk.co/tefozakozup/gibxGjd/narituxuxaziz.pdfIn PDF document text
    • http://ruzazeruduzelu.22web.org/vowomudepusagu.pdfIn PDF document text
    • https://pexiseziburenof.weebly.com/uploads/1/3/4/6/134685472/naxiwaraxavifa.pdfIn PDF document text
    • https://cdn.sqhk.co/difixoruze/jjcJjih/85698237084.pdfIn PDF document text
    • https://cdn.sqhk.co/bitowiso/gehi8R0/best_outdoor_skydiving_near_me.pdfIn PDF document text
    • https://talunijepi.weebly.com/uploads/1/3/4/5/134599753/wajogemi_vowimabanelig.pdfIn PDF document text
    • https://velalozelo.weebly.com/uploads/1/3/4/4/134498802/0f60dce3fe.pdfIn PDF document text
    • https://vipobonufemug.weebly.com/uploads/1/3/5/4/135401160/45066551.pdfIn PDF document text
    • https://xovifare.weebly.com/uploads/1/3/4/5/134524114/7be2520fe1c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/level_6_logo_quiz_game_answers.pdfIn PDF document text
    • http://kavolimuteso.epizy.com/44692503343.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/insomnia_2002_movie_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/charades_game_cards.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bf7d1c2-9b54-4096-b633-16cec5f20889/a_chorus_line_richie_monologue.pdfIn PDF document text
    • http://nepopenezum.rf.gd/79819645090.pdfIn PDF document text
    • https://s3.amazonaws.com/gazijewevan/25318078446.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a6cb104-9529-4b9e-bb14-05d764149eb4/samsung_grand_prime_plus_battery.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/cartoon_hd_app_for_android_box.pdfIn PDF document text
    • http://movebuze.epizy.com/nulabelebis.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/wipomoxozo.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_off0000fbfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBFD 5304 bytes
SHA-256: c3afdedb9221e5a15cd2ed54cc007849cbaa897a0089a054ad5771deb0056f52
font_01_sfnt_off00010e0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E0E 10484 bytes
SHA-256: f807aeb9f8118ab1f0f01240d35026b72c9b9fe1d4f24692aaefca879260ff60

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