Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f7ae0f09407d5cc…

MALICIOUS

PDF

84.6 KB Created: 2021-02-17 22:43:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3c716d32d63ee6f6ac05e11c39b45af5 SHA-1: 12b990294d420cd7aa22bde30934911dd0b4c704 SHA-256: 3f7ae0f09407d5cc37c55a1abed1ccd7bc152442ea4380b03267502726afe4e8
156 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 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://maypoin.ru/123?utm_term=shark+professional+steam+mop+covers PDF link annotation
    • http://fifukeluforonis.22web.org/37732229736.pdfIn PDF document text
    • https://fudukonuxevefez.weebly.com/uploads/1/3/4/6/134606022/2493513.pdfIn PDF document text
    • https://gakujoxabusu.weebly.com/uploads/1/3/5/3/135394689/1537494.pdfIn PDF document text
    • https://sukanoxe.weebly.com/uploads/1/3/1/4/131453950/weponadomaruxu-getidolowewazi-ruritid.pdfIn PDF document text
    • https://wexabegolorumad.weebly.com/uploads/1/3/4/3/134351445/vutodisamazaxi_rovajuzatob_wodaki.pdfIn PDF document text
    • https://cdn.sqhk.co/gogojelawov/ZicrhhI/vunaxorewopu.pdfIn PDF document text
    • https://cdn.sqhk.co/kawinojos/cge7Ugf/rutekova.pdfIn PDF document text
    • https://wirupexulabajes.weebly.com/uploads/1/3/5/3/135322132/3270227.pdfIn PDF document text
    • https://cdn.sqhk.co/fusunusol/cetfib2/sling_blade_cast_imdb.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/wobuzisibal/hillsborough_county_public_schools_online_report_cards.pdfIn PDF document text
    • http://jigujirew.epizy.com/google_sheets_add_ons_missing.pdfIn PDF document text
    • http://xuxegukazo.rf.gd/poem_form_abababcc.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/65271578111.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/gekuwaxutizuxaragiwerama.pdfIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/bachelorette_party_invitations_template_free.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_off00010af4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF4 5480 bytes
SHA-256: 8b44afe90385aac8acf4893463511ae85ab389b0dd3df7ad732d35da334710f4
font_01_sfnt_off00011d7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D7A 11812 bytes
SHA-256: 99d7e831f04e8eb557331c67db9c002c900211a5b5548f87763d03212d0a397c

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