Malicious PDF — malware analysis report

Static analysis result for SHA-256 31b051a21a4c49a2…

MALICIOUS

PDF

72.6 KB Created: 2021-03-09 19:53:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 80e376b67986eaceb9f4dd08c4a36a7c SHA-1: eab329f09a30a74daa476d6c917e74d4c9aff9b9 SHA-256: 31b051a21a4c49a2f4641edc3635c46b6bcb5c3c6874ea3a4b34869cd95bfdef
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://maypoin.ru/wix?keyword=best+torrenting+sites+2020+reddit PDF link annotation
    • https://tufojeju.weebly.com/uploads/1/3/0/7/130740258/2877195.pdfIn PDF document text
    • https://widonudafedezu.weebly.com/uploads/1/3/0/7/130776490/betalug.pdfIn PDF document text
    • https://cdn.sqhk.co/joxonorapa/hiib8hg/zubolefed.pdfIn PDF document text
    • https://wizitizisib.weebly.com/uploads/1/3/4/3/134361222/sitofiza.pdfIn PDF document text
    • https://sijalafad.weebly.com/uploads/1/3/4/8/134887162/1223055.pdfIn PDF document text
    • https://cdn.sqhk.co/faxidopudome/4vu4gfi/yellow_apps_to_download_iphone.pdfIn PDF document text
    • https://sisasava.weebly.com/uploads/1/3/0/7/130738988/dbc48c8710425.pdfIn PDF document text
    • https://loguxofe.weebly.com/uploads/1/3/0/7/130775118/benasupapog.pdfIn PDF document text
    • https://zijobezugol.weebly.com/uploads/1/3/2/6/132682913/kojarugebolaxubiketu.pdfIn PDF document text
    • https://fupigipefixoxom.weebly.com/uploads/1/3/1/3/131379213/1babe71ab3.pdfIn PDF document text
    • http://rabiwitijif.medianewsonline.com/xojoz.pdfIn PDF document text
    • https://cdn.sqhk.co/kutajanode/4ibhbhf/winter_olympics_2020_sports.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1a2149e7-ca7f-4e7c-a584-0e483de6f3af.filesusr.com/ugd/9219f8_e14a96c8c6a74d7a97085ab24f10759b.pdf?index=trueIn PDF document text
    • https://2d2b1dae-c014-4902-97e6-c3f1d56915cd.filesusr.com/ugd/70e5f7_0acdd519a19d42b08097e8da0088ee6d.pdf?index=trueIn PDF document text
    • https://083189c9-8220-4687-a375-57be19a37228.filesusr.com/ugd/909b15_a4176c6c484e4173ace5ed8765607669.pdf?index=trueIn PDF document text
    • https://d0275d90-c5b4-4c72-b581-d0e2b62fc6dd.filesusr.com/ugd/ee54da_f60d23c9818341299ae544de5403bae2.pdf?index=trueIn PDF document text
    • http://duziroro.myartsonline.com/sears_kenmore_sewing_machine_parts_diagram.pdfIn PDF document text
    • https://2d4b4c3f-e7cf-443e-b200-c27eae6bda74.filesusr.com/ugd/3b0c81_9865cf6c5cf34fc281345de6a4e0d69d.pdf?index=trueIn 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_off0000e0d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D1 5076 bytes
SHA-256: 9d0d3fde24ac48d78570d8081c31e2737167a07f0f83715a5115951928ad160f
font_01_sfnt_off0000f22b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22B 10348 bytes
SHA-256: 2cac51e9709ce8002783d72d47993317db0d5155ffda0cfc89edb0c256b51dc9

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