Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f8293f5adf54618…

MALICIOUS

PDF

75.8 KB Created: 2021-03-24 21:27:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7316a8607d44e3b4fed1a4e145b38aed SHA-1: 7c96b2b8a14d9e2e42856f65d6bd9e63b7373403 SHA-256: 2f8293f5adf546182fef8e68abe5c9373e4fb290a1fa4ba2b1ad967a462d9b41
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO spam or phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as Pdf.Phishing.Trojan. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic suggest the document's primary purpose is to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://botokaw.ru/strik?utm_term=msp+quality+management+strategy+template
    • https://cdn-cms.f-static.net/uploads/4500183/normal_60413f071c901.pdf
    • https://cdn.sqhk.co/budatumibowu/U5mNig6/nfl_network_channel_on_cablevision.pdf
    • https://zuzoperelalame.weebly.com/uploads/1/3/2/6/132683259/219494.pdf
    • https://static.s123-cdn-static.com/uploads/4464996/normal_5ffba75297582.pdf
    • https://gumabudisipinef.weebly.com/uploads/1/3/2/7/132712006/62a305.pdf
    • https://cdn-cms.f-static.net/uploads/4503214/normal_603a201b492f1.pdf
    • https://duxubekuzew.weebly.com/uploads/1/3/4/5/134506612/nebimexusofi_poxowimojin_nabin_pekifokowabujeg.pdf
    • https://kotafogora.weebly.com/uploads/1/3/4/3/134322717/nanuzubifek.pdf
    • https://bozuzagon.weebly.com/uploads/1/3/4/6/134666742/nujubife.pdf
    • https://kokesekodabese.weebly.com/uploads/1/3/4/0/134012443/nujux.pdf
    • https://vipukawolatu.weebly.com/uploads/1/3/4/4/134486161/dinizexalilepuf-wubosularusule-zofam-zijobe.pdf
    • https://cdn.sqhk.co/nusatabi/idodjh6/76446500080.pdf
    • https://static.s123-cdn-static.com/uploads/4368246/normal_600072336ed6d.pdf
    • https://static.s123-cdn-static.com/uploads/4368243/normal_5ff274862d50b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://47e4df30-8702-49a4-8bd5-327e1546ff06.filesusr.com/ugd/379272_6b79997f0abe423ca2deaa340fdada96.pdf?index=true
    • https://71a5d838-4e22-4830-8da1-7955ec3365f5.filesusr.com/ugd/f2f43e_f58c700388394cf9ae2d81b32d097c27.pdf?index=true
    • https://49432a94-54bc-4d13-9d12-ea41d731e1b8.filesusr.com/ugd/a7c689_c8185f1bd0404d63aa729ceea7a0e676.pdf?index=true
    • https://b7af6bb9-01eb-4839-ab56-764651de4344.filesusr.com/ugd/2486b5_386235eace1746169a11c3c05d39ed89.pdf?index=true
    • https://937a8a2d-b41a-4163-aff8-eda6db263557.filesusr.com/ugd/21e6f2_74716fcbb8744a7b9fbac105fb19a79f.pdf?index=true
    • https://56a7be67-7dca-40da-a973-69ad719fb73b.filesusr.com/ugd/fedf23_f2b518f3e3ff4f3da9a753c3f50582f9.pdf?index=true
    • https://84d5b3ab-51dd-4312-87b7-51df18fb3b26.filesusr.com/ugd/9ea9b6_25d925bc73834bf5adcd49c753209df4.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec2a.bin
7492e853a77a8e1df6de77de03d561b0a8bab487c9a8410d65b40cb433f1e49c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2A 5372 bytes
font_01_sfnt_off0000fe6f.bin
e257b517f9a2058aeb45732246b0efcf166809f0137222720a732f27bbb9ed37		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6F 10456 bytes

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