Malicious PDF — malware analysis report

Static analysis result for SHA-256 67a46acd376204f8…

MALICIOUS

PDF

80.5 KB Created: 2021-05-31 23:30:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: aa79cee84255eb9ff9def1b1c15ea9aa SHA-1: 06aa4a013a91e1d8cc088757aaf82344159ba598 SHA-256: 67a46acd376204f8ad313bd29e8a2222b91c23fd66ce93f96e77d045e73a730f
186 Risk Score

Malware Insights

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

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 0.9997

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 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://mezovuduw.ru/123?utm_term=facebook+videos+iphone+tweak PDF link annotation
    • https://rowaxomizubo.weebly.com/uploads/1/3/2/3/132302787/da06ea863be7407.pdfIn PDF document text
    • https://vufosaxirit.weebly.com/uploads/1/3/4/0/134018891/kubodeso_mezofusazip_dosojoroj_muriz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375514/normal_5fd7a59796997.pdfIn PDF document text
    • https://mawosamaretezij.weebly.com/uploads/1/3/4/8/134860838/396bddc510c69e6.pdfIn PDF document text
    • https://fokifukamanur.weebly.com/uploads/1/3/0/8/130874497/voletitozewis.pdfIn PDF document text
    • https://biluzatof.weebly.com/uploads/1/3/7/5/137506635/mojilowek-zadolov.pdfIn PDF document text
    • https://togasiwivote.weebly.com/uploads/1/3/4/3/134370981/2898130.pdfIn PDF document text
    • https://pazumiwasosum.weebly.com/uploads/1/3/4/8/134892739/vivowokezamimovili.pdfIn PDF document text
    • https://sujuwamor.weebly.com/uploads/1/3/4/7/134719544/vuleliwokos.pdfIn PDF document text
    • https://fowedejuman.weebly.com/uploads/1/3/4/5/134518602/kosojiboviguxem.pdfIn PDF document text
    • https://tugivopufik.weebly.com/uploads/1/3/4/3/134348802/xitetu_gewator_zesabosasowubo_fevelude.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387711/normal_60612a3d39622.pdfIn PDF document text
    • https://jogemubo.weebly.com/uploads/1/3/4/3/134321321/zirisibimanoxetex.pdfIn PDF document text
    • https://vewisegi.weebly.com/uploads/1/3/4/4/134434396/xiwibomunasaw.pdfIn PDF document text
    • https://pezusadoti.weebly.com/uploads/1/3/4/5/134525395/tefen.pdfIn PDF document text
    • https://kumobavubisu.weebly.com/uploads/1/3/0/7/130775432/ginujiles.pdfIn PDF document text
    • https://denumojadiribik.weebly.com/uploads/1/3/4/0/134042792/sapabowunokem-nexojadumu.pdfIn PDF document text
    • https://sogazefod.weebly.com/uploads/1/3/4/0/134000298/6336156.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424007/normal_6000b42325656.pdfIn PDF document text
    • https://zodajuxos.weebly.com/uploads/1/3/4/2/134235393/1239089.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/7149827f-689e-473b-90f4-36d8a2534f0f/how_to_use_removable_matte_vinyl_cricut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89c555db-7a24-44e0-82a8-5c8323f8026f/books_suitable_for_5-8_year_olds.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_off0000fca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA0 5344 bytes
SHA-256: 1ec4c03f704b15b9763f13e69b25e99e71ec3d55b98e15640fceb484fa9d0108
font_01_sfnt_off00010edf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EDF 11040 bytes
SHA-256: 98a696b625c982b98f7d387419f3f541d4e428acbd1c0407d34c94c0e4913900