Malicious PDF — malware analysis report

Static analysis result for SHA-256 87a098506daf773d…

MALICIOUS

PDF

72.0 KB Created: 2021-02-12 11:16:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 5f8e3cb180e45107b115dc0243106ba8 SHA-1: b925acbe6631a1ece2dd63dd2f3238c3557cfeaa SHA-256: 87a098506daf773dfdc6644508b125edda246babf941b8105a41a5cfd2b718e0
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/wix?keyword=blackboard+learn+qcc PDF link annotation
    • https://cdn.sqhk.co/kiledone/njaPhcp/12958718912.pdfIn PDF document text
    • https://minileponefij.weebly.com/uploads/1/3/1/0/131070526/vapetepib_rapij_jalijawisoguvab.pdfIn PDF document text
    • https://cdn.sqhk.co/dezorevukor/ehbhjgj/56136984879.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406168/normal_6008eda776b53.pdfIn PDF document text
    • https://kigadipokifexi.weebly.com/uploads/1/3/0/8/130813079/kepeteja.pdfIn PDF document text
    • https://wakevilapiz.weebly.com/uploads/1/3/4/9/134903367/jumojeleba.pdfIn PDF document text
    • https://mokomowu.weebly.com/uploads/1/3/5/9/135969792/1384198.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455375/normal_5fee73b178a17.pdfIn PDF document text
    • https://cdn.sqhk.co/fevivesuxofo/hgjavjh/word_search_puzzle_books_large_print_subscription.pdfIn PDF document text
    • https://tuzeninepag.weebly.com/uploads/1/3/2/8/132814935/3738593.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480148/normal_5fe3417e2af8f.pdfIn PDF document text
    • https://zomerasojukoluw.weebly.com/uploads/1/3/4/7/134769652/f4437d99e.pdfIn PDF document text
    • https://kunolutupevuj.weebly.com/uploads/1/3/4/7/134772201/tejerotavodo_pisegadu.pdfIn PDF document text
    • https://kadekorik.weebly.com/uploads/1/3/1/4/131453454/ronisatawixaguf.pdfIn PDF document text
    • https://talaxosukizarom.weebly.com/uploads/1/3/0/7/130775084/wezotowijeram-zagomopujasis.pdfIn PDF document text
    • https://vaxejoxumede.weebly.com/uploads/1/3/5/3/135346770/1274420.pdfIn PDF document text
    • https://zazivobonapi.weebly.com/uploads/1/3/2/6/132696398/5a2424bd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454056/normal_5ff0daf97840e.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/rubidokezive/wutamuxemina.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/annual_credit_report_dispute_form.pdfIn PDF document text
    • https://cunyportal.cuny.edu/In 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_off0000dbbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBBB 5136 bytes
SHA-256: 5b8f1d4cef6461af3a47bc68c4a97700ea32132b55477dde6e4a6466cf8dd670
font_01_sfnt_off0000ed39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED39 10988 bytes
SHA-256: 438dc781503f193ca130865cb050a73a5eae81d0cf50ff14ec386e4c43172bfd

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