Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f1e56074f01b60c…

MALICIOUS

PDF

69.7 KB Created: 2021-01-16 05:31:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 7fea84ed85f12b4a390bfc7c3b55d6db SHA-1: 7c73fb74fa7d0232ce282128840facd0ab87a66c SHA-256: 2f1e56074f01b60c62d06c099787ca31182a173a538d552a32ee0361ffed45e6
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique often used for SEO farms or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

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://traffset.ru/123?utm_term=douchebag+workout+beach+club+hacked PDF link annotation
    • https://xogexemufak.weebly.com/uploads/1/3/1/4/131437987/5648391.pdfIn PDF document text
    • https://site-1173612.mozfiles.com/files/1173612/train_simulator_union_pacific_challenger.pdfIn PDF document text
    • https://tololomajaju.weebly.com/uploads/1/3/4/4/134472688/xibezinokudefat-lovuvelukasubo-zedulezorob-tovesenewetomo.pdfIn PDF document text
    • https://nafoxowozuvika.weebly.com/uploads/1/3/1/3/131383754/3039621.pdfIn PDF document text
    • https://sogatetemurus.weebly.com/uploads/1/3/4/3/134379625/9419636a.pdfIn PDF document text
    • https://gadufekovofu.weebly.com/uploads/1/3/4/7/134764592/kenozepipajunexodure.pdfIn PDF document text
    • http://www.gamesfree.ca/game/8548/pl...bag-beach-clubIn 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
    • https://s3.amazonaws.com/wiwuxot/77916570737.pdfIn PDF document text
    • https://s3.amazonaws.com/makixibawumebol/mozolupapozinasidola.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c20b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC20B 5044 bytes
SHA-256: 0429e1e4d805749f2cc740f8b7bfc68e531454a7d5d5c4e6bc40b6c4e2e6640e
font_01_sfnt_off0000d359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD359 12924 bytes
SHA-256: 73ea66b2f78bf6bcae7daf8ba857c74e4414670d5b189345abbcb598d3818dfd
font_02_sfnt_off0000fbff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBFF 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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