Malicious PDF — malware analysis report

Static analysis result for SHA-256 265f2a87aaeb9386…

MALICIOUS

PDF

72.4 KB Created: 2021-03-27 17:01:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c006fccf83d15900506a92c8d27fe981 SHA-1: 9014141a88de53564d687bde9ad13a6f2843da95 SHA-256: 265f2a87aaeb9386a6d512e4ecdf219ca950f70b4031a451c17a30416efcc65e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crophysi.ru/123?utm_term=whatsapp+gb+anti+blokir+terbaru PDF link annotation
    • http://vesadarole.iblogger.org/imprim_acompte_provisionnel_tunisie_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/logubaxe/ziqlidM/86774861323.pdfIn PDF document text
    • http://english-10.site/minority_report_cast_lara_vegai1uoj.pdfIn PDF document text
    • https://cdn.sqhk.co/vixuzemabad/Nichahi/1715425321.pdfIn PDF document text
    • http://3203epworthcres.com/how_much_does_a_cracked_ipad_screen_cost_to_repair0h1gk.pdfIn PDF document text
    • https://cdn.sqhk.co/zeliravepuj/i6iHi5Y/wikimedia_commons_gallery.pdfIn PDF document text
    • https://cdn.sqhk.co/naxokujim/Hhcoijg/judalid.pdfIn PDF document text
    • http://timecodes.net/mibegovuwogazatowapiuf18.pdfIn PDF document text
    • https://cdn.sqhk.co/pigevikuwi/je0ghic/wuleruniwopap.pdfIn PDF document text
    • https://cdn.sqhk.co/mogilirexexa/8mjijhK/balenciaga_shoes_track_white.pdfIn PDF document text
    • https://cdn.sqhk.co/rosafipex/wSNchjh/wajasijopunu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c26056df-d2d1-414e-bbf4-cbb59b9607d4/timeless_vitamin_c_serum_review_makeupalley.pdfIn PDF document text
    • http://digupusulufo.epizy.com/types_of_interrogation_techniques.pdfIn PDF document text
    • http://fabavokawibawo.epizy.com/pewin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec623589-2fc3-4237-86ab-79f970589c0b/guitar_chords_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d26089a-1e0d-4c0f-bb4c-58a8e00a2c1d/did_lara_jean_and_peter_sleep_together_on_the_ski_trip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5357f7cb-3e53-4cec-9dbc-fab0c33f4a02/how_to_get_ripped_with_kettlebells.pdfIn PDF document text
    • http://tebedenuvar.rf.gd/fadilovas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eace4a21-b9f1-4bcf-b748-b89e630cea99/55858729776.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_off0000ddff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDFF 5296 bytes
SHA-256: fc5ad0c4b2718948e6178e4fb3945c85790a892c25a938bf091dbd48db0507bd
font_01_sfnt_off0000f00b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF00B 10304 bytes
SHA-256: 556eef37ab7abc3e789742f37604acc8329c7f8bc58843345bc29d0787d6a191

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