Malicious PDF — malware analysis report

Static analysis result for SHA-256 46d6433033eee8b0…

MALICIOUS

PDF

75.5 KB Created: 2021-04-16 18:41:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 433223b2e37bb255b1b006b1a434f7fd SHA-1: 5afff3c467265b224cb2220dd54bcd8a07f4455c SHA-256: 46d6433033eee8b094b4a31280161fa957920744f2af4daa37f4c6badb9d7fc2
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 0.9993

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://dugedepap.ru/strik?utm_term=leica+m6+ttl+0.85+for+sale PDF link annotation
    • https://cdn.sqhk.co/baxafapunubi/Rogcy3u/34702844270.pdfIn PDF document text
    • https://pibefabetanob.weebly.com/uploads/1/3/4/3/134376782/xolafafenafimijateno.pdfIn PDF document text
    • https://wufezaju.weebly.com/uploads/1/3/0/7/130738917/1647224.pdfIn PDF document text
    • https://lagisarer.weebly.com/uploads/1/3/4/1/134131240/dudolu_foxevazo_fojirofefep_sibem.pdfIn PDF document text
    • https://renudufodajofi.weebly.com/uploads/1/3/4/8/134884992/mokolewagake_wipabufuzigiwa_segafurisudu_simazo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446377/normal_60375e0f2bc0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475203/normal_60551fc59d2ac.pdfIn PDF document text
    • https://zirufijidure.weebly.com/uploads/1/3/5/3/135316647/nezurixufavidorizex.pdfIn PDF document text
    • https://jifemeput.weebly.com/uploads/1/3/4/3/134398411/zotigu.pdfIn PDF document text
    • https://nibafowezibinax.weebly.com/uploads/1/3/4/3/134319588/6a12bfc8a3.pdfIn PDF document text
    • https://nokogijesa.weebly.com/uploads/1/3/1/4/131452879/61dee16df24.pdfIn PDF document text
    • https://cdn.sqhk.co/xurawupo/bgeibIj/shelby_super_snake_2020_cost.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421461/normal_604fb34ed9450.pdfIn PDF document text
    • https://liramuxusere.weebly.com/uploads/1/3/4/5/134577046/3eb2d2ec58.pdfIn PDF document text
    • https://cdn.sqhk.co/ragejeli/hdVgiih/bright_leather_dog_collars_ireland.pdfIn PDF document text
    • https://mugozesomufigor.weebly.com/uploads/1/3/4/6/134608113/mabekokusu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474759/normal_606aa4d5c6e8f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2703069b-a6ff-4ff9-983c-db139a8d76ba.filesusr.com/ugd/8b61cf_82793aa3a85144c481253464eb3a3156.pdf?index=trueIn PDF document text
    • https://ddf64d59-5240-4154-9987-17dfc28e22c7.filesusr.com/ugd/cec570_3557a3fb5f72469ba0d20b91706e8d61.pdf?index=trueIn PDF document text
    • https://543e2b4d-9699-46d2-9656-875e860b8e63.filesusr.com/ugd/fb32d0_b5071abf2d614483b5fd85db2a83414c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/blood_cells_formed_in_bone_marrow.pdfIn PDF document text
    • https://6a24fdd2-d4a5-4c4b-882b-0f3115751bcf.filesusr.com/ugd/04e6f9_391db56c63a24f9582660c9952ea5fef.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/vadivumimeputo.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_off0000e79e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79E 5616 bytes
SHA-256: 1da6afe8616738f43678060830cfa773e3061ddff05575b482a742380e9f04dd
font_01_sfnt_off0000fab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB1 11224 bytes
SHA-256: 61fa115a285e9071eb72f4f76d1d60b018c58bc0afda967464bd92b42072188f