Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcc8f1a10d25181f…

MALICIOUS

PDF

78.8 KB Created: 2021-06-01 13:33:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 08a5ea656127e0f7f690ce37d4448f92 SHA-1: adee98ada898ff80a7a5123f9046c2af37b83c4c SHA-256: bcc8f1a10d25181f0818e69aeef8abfde9119330051e76232024c6f11bdd2820
146 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL pointing to 'crewmak.ru' and referencing 'pokemon ultra sun and moon free download codes'. This, combined with heuristics indicating a link farm and ML classification, strongly suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, likely to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://crewmak.ru/pbw?utm_term=pokemon+ultra+sun+and+moon+free+download+codes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413456/normal_6044a4ff5d1ec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379237/normal_5fcca473c8617.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445739/normal_604cfb6bd25da.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413454/normal_5fde84bb6c832.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377938/normal_600be2fa5dd40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374710/normal_605995d20b922.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427809/normal_6067364514206.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427293/normal_60317c4bafec8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479906/normal_6054ef295e307.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/c7ab2cb6-00d0-467f-a7c4-ccbd9b5377c7/badokuge.pdfIn PDF document text
    • http://kefimazusob.pbworks.com/w/file/fetch/144424623/11522464588.pdfIn PDF document text
    • http://sijomirurefi.pbworks.com/f/62042548804.pdfIn PDF document text
    • http://bawamotijeku.pbworks.com/w/file/fetch/144445350/sogabada.pdfIn PDF document text
    • http://zekodunu.pbworks.com/f/kirajufalojubalik.pdfIn PDF document text
    • http://kokoxudalux.pbworks.com/f/castle_defense_2_mod_apk_revdl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86aad28c-e060-4ea8-87a6-911c8584baf0/37810274639.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8afb517c-bf18-406c-9751-26e2fbd16737/oraciones_de_pronombres_personales_y_posesivos.pdfIn PDF document text
    • http://jifesepapo.pbworks.com/w/file/fetch/144450459/83904268708.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f795e381-1aea-4132-b40b-1321f869834c/whirlpool_gold_series_gas_range_parts.pdfIn PDF document text
    • http://xiwitanul.pbworks.com/w/file/fetch/144459099/prisman_assassin_value_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/089c7393-4e43-44ac-a0a9-7ee6c546f4b5/which_foods_have_complex_carbs.pdfIn PDF document text
    • http://xojifot.pbworks.com/w/file/fetch/144423600/moxanapapukiseporewekere.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_off0000f716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF716 5324 bytes
SHA-256: 6fd5d76754a82e5e977bea6afeb400b4db12524d3fec41a03a1cabccdbe56224
font_01_sfnt_off00010930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10930 10780 bytes
SHA-256: c50d4f7f23120a8f961cce0e47211c17a998040e905433567031356713a02565