Malicious PDF — malware analysis report

Static analysis result for SHA-256 0585cbce8f3062bc…

MALICIOUS

PDF

66.0 KB Created: 2021-02-06 18:56:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: e1c9a156a4fe1f35a7a59a3ac2f02f22 SHA-1: 8e65d3ed20f8f936f698e9cc7fdd13e30aa8e742 SHA-256: 0585cbce8f3062bcf85b770c81553040ad93592bb642d8ce5d37e453a1f2f23d
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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://bologen.ru/wb?keyword=fv%20almelo%20font%20free PDF link annotation
    • https://lupoxever.weebly.com/uploads/1/3/1/4/131413766/7d68ed1.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwaseja/genc6NY/lafujizitekidibabex.pdfIn PDF document text
    • https://fazerirusabutef.weebly.com/uploads/1/3/1/3/131381144/7846897.pdfIn PDF document text
    • http://begdas.space/63822912103ud0ut.pdfIn PDF document text
    • https://gokokunebede.weebly.com/uploads/1/3/0/8/130874183/55c27.pdfIn PDF document text
    • http://blacktea.space/les_alphas_maternelleh7bv8.pdfIn PDF document text
    • http://card2card.live/simple_request_letter_formatu2ea6.pdfIn PDF document text
    • http://bluebadgeapproval.com/game_bully_offline_mod_apkk1thf.pdfIn PDF document text
    • https://nedijevir.weebly.com/uploads/1/3/1/4/131406348/2416161.pdfIn PDF document text
    • http://avit0.cc/tawipukufifonefc74rx.pdfIn PDF document text
    • http://youralteragoods.com/gilorusizozu4qb2.pdfIn PDF document text
    • https://zatiwakap.weebly.com/uploads/1/3/1/8/131871625/8821990.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/zaxuledo/geromisojawajira.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/one_piece_grand_battle_mugen.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/brenda_fassie_songs_black_president.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_off0000c069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC069 4752 bytes
SHA-256: 0caa4e715c4d4ef2c6eed973521fbe93c15b5a1eeab4eda86d4f3a9e76a17780
font_01_sfnt_off0000d085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD085 12772 bytes
SHA-256: c69356781c703c3bc48d2195a32109814e8d6dd224de0e6b519fb63e67f12fc9