Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9fe109bdfa512d1…

MALICIOUS

PDF

76.9 KB Created: 2021-01-10 04:03:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: edab47eb2e9195fdf0e44426a9737a02 SHA-1: 7332c548a78d354569f10b13bd2a60c4bbb88ed9 SHA-256: f9fe109bdfa512d1e0ad0e7fb4c6780542a6900bf8c77c82116f27584e84b258
156 Risk Score

Malware Insights

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

This PDF document contains numerous external links, indicative of a link farm or phishing attempt, masquerading as a strategy guide. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a phishing or content-scraping attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://trafffe.ru/123?utm_term=mcdonald%2527s+video+game+strategy PDF link annotation
    • https://gegakavawedo.weebly.com/uploads/1/3/4/2/134265750/22820a.pdfIn PDF document text
    • https://zigajimimokok.weebly.com/uploads/1/3/1/3/131383588/9585671.pdfIn PDF document text
    • https://lifexusubanipi.weebly.com/uploads/1/3/4/3/134377686/vujukika-wofapibebuwuxoz-satoziluniwapu.pdfIn PDF document text
    • https://rarikomedos.weebly.com/uploads/1/3/4/6/134616559/dirowovawek.pdfIn PDF document text
    • https://kuvofexe.weebly.com/uploads/1/3/1/1/131163751/3874214.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/farezelof/57818466051.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/jafowuturubifiruk.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/the_hindu_newspaper_today_in_english_download_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/zifuwitemamusabewola.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/6314587871.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/4020119036.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/11401705611.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_off0000f200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF200 5460 bytes
SHA-256: 9a134d12317d479463739c450a20ec4c10e54afda5c44a8a8f3e942ac3c3f3e4
font_01_sfnt_off0001049a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049A 10068 bytes
SHA-256: 076283bbea682d50f639864c4ff807339148746f1bdf757cbddaedd0aaac67d1

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