Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8c67748e9cf6254…

MALICIOUS

PDF

88.1 KB Created: 2021-06-08 15:33:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f007851bcc63626f13c99aa94f3d7934 SHA-1: b32e4f1d5a66a87680035728db43fecbfe9f7475 SHA-256: d8c67748e9cf6254b1e779375d937ff2e3f37b34ee01bc0074e370636db91b09
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 0.9951

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://wastran.ru/pbw?utm_term=cv+format+sample+in+ethiopia+pdf PDF link annotation
    • https://fekobuwag.weebly.com/uploads/1/3/1/8/131858403/cff108e77497d.pdfIn PDF document text
    • https://lupudeme.weebly.com/uploads/1/3/1/3/131378919/resofufafo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443809/normal_600dc61aef461.pdfIn PDF document text
    • https://nibobesexetew.weebly.com/uploads/1/3/4/2/134266191/765081.pdfIn PDF document text
    • https://fivujage.weebly.com/uploads/1/3/4/3/134316273/8786345.pdfIn PDF document text
    • https://kepigepejabuji.weebly.com/uploads/1/3/4/3/134315220/tulolapopupesobegemo.pdfIn PDF document text
    • https://tukusalo.weebly.com/uploads/1/3/0/9/130969921/lalezivoza.pdfIn PDF document text
    • https://sunuzokelegawo.weebly.com/uploads/1/3/4/4/134476032/1154922.pdfIn PDF document text
    • https://zabebopid.weebly.com/uploads/1/3/4/5/134585494/3728943.pdfIn PDF document text
    • https://gudesikoz.weebly.com/uploads/1/3/4/3/134374550/bdece19.pdfIn PDF document text
    • https://gafanobekifin.weebly.com/uploads/1/3/4/7/134768645/907b07cda42b5.pdfIn PDF document text
    • https://lanoxujuzon.weebly.com/uploads/1/3/4/6/134630121/zelugubigedamo_livididovituti_benejozulasu.pdfIn PDF document text
    • https://xijuwubime.weebly.com/uploads/1/3/4/2/134234920/037856db036.pdfIn PDF document text
    • https://pofisuxix.weebly.com/uploads/1/3/4/0/134016862/47d21e4f1a1d4a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420430/normal_604acd9298415.pdfIn PDF document text
    • https://rukururage.weebly.com/uploads/1/3/0/9/130968917/1360149.pdfIn PDF document text
    • https://fasitidepev.weebly.com/uploads/1/3/4/3/134312072/505195.pdfIn PDF document text
    • https://bogigevaruzo.weebly.com/uploads/1/3/4/4/134435623/fikaz.pdfIn PDF document text
    • https://gumewutudeg.weebly.com/uploads/1/3/0/8/130813982/rimegug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457305/normal_603b73ea71da5.pdfIn PDF document text
    • https://fupomojokom.weebly.com/uploads/1/3/4/4/134458651/zusememi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461751/normal_6063053f74f36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450351/normal_600fc6931a962.pdfIn PDF document text
    • https://pekupepavipojev.weebly.com/uploads/1/3/1/8/131872203/bajikuxebexezo-nijivil.pdfIn PDF document text
    • https://javesuput.weebly.com/uploads/1/3/0/8/130873829/f6e27cb2.pdfIn PDF document text
    • https://pepajodik.weebly.com/uploads/1/3/1/4/131453945/kovukatufopat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C0D 5152 bytes
SHA-256: cf55d0ad07a12abdc916a851aca185f3620ff4d2a086da3a1ea12b75a4fd21f1
font_01_sfnt_off00011d67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D67 11364 bytes
SHA-256: db857993591bdd4b73a25d63a4cff1de93d73b49a7565370ed8fd365272ff537
font_02_sfnt_off00014424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14424 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c