Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cc45912e9679ea0…

MALICIOUS

PDF

77.0 KB Created: 2021-01-10 01:11:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 1df862ab12b59d944842f9530f64859e SHA-1: 8438733a0da43d216d14bf1f50c5da93e9af13f9 SHA-256: 8cc45912e9679ea00fce69ee85498be700197702029dda0b0bfc97bf4d4e946b
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, and is flagged by ClamAV as a phishing trojan. The ML classifier also strongly indicates maliciousness. While no scripts were explicitly extracted, the nature of the link farm suggests it's intended to redirect users to malicious sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://traffnew.ru/aws?utm_term=bph+treatment+guideline PDF link annotation
    • https://cdn.sqhk.co/nitunoda/iiaESCe/gta_5_story_mode_mods_epic_games.pdfIn PDF document text
    • https://jirozonuk.weebly.com/uploads/1/3/1/6/131606844/fe7c705c.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/jogowezokuvaxu.pdfIn PDF document text
    • https://cdn.sqhk.co/tinipuded/vhfghje/mopakimotedi.pdfIn PDF document text
    • https://cdn.sqhk.co/rapurakoke/HEH9vij/wewekebewubipareka.pdfIn PDF document text
    • https://cdn.sqhk.co/kawonidoza/cgfjhhg/xurefifofuwazibev.pdfIn PDF document text
    • https://soremezu.weebly.com/uploads/1/3/1/0/131070226/rakuvone.pdfIn PDF document text
    • https://sijevunima.weebly.com/uploads/1/3/1/8/131859613/2937669.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368501/normal_5fc4d44574af6.pdfIn PDF document text
    • https://cdn.sqhk.co/vixuzemabad/dcgfBjb/commuter_rail_boston_to_newburyport.pdfIn PDF document text
    • https://wizejuxexena.weebly.com/uploads/1/3/4/6/134655833/kovorakasowat.pdfIn PDF document text
    • https://cdn.sqhk.co/manuguwe/fajagdf/.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468871/normal_5fc6d844c0798.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/hthhbif/ripipokututupunexupijida.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000eee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE1 5244 bytes
SHA-256: 2084752db47e4760d74bfc831394dfbb3818d9664a8375f4835116aa28f34ed8
font_01_sfnt_off00010088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10088 12240 bytes
SHA-256: f6049a0637a6e1ec1ae66369f21878a9d994e8153b53e96893255f47d7749934

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