Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a0fdb6483ab2e64…

MALICIOUS

PDF

64.8 KB Created: 2020-12-19 06:53:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: d3f05f285aef04a2b8758d30527d7b34 SHA-1: bc07ceff0ce89f80aa5d043af3a8b4989014aeec SHA-256: 1a0fdb6483ab2e6435757e5914b303ca9765b8793f26cf9067c52e89272e42db
156 Risk Score

Malware Insights

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

The file is a PDF that exhibits characteristics of a link farm, with a heuristic firing for 'PDF_SEO_LINK_FARM' indicating numerous external links. One of these links, 'https://trafficel.ru/123?utm_term=sony+soundbar+ht-ct370+manual', is presented in the document body, disguised as a product manual. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware through the linked documents.

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://trafficel.ru/123?utm_term=sony+soundbar+ht-ct370+manual PDF link annotation
    • https://xunowarusaki.weebly.com/uploads/1/3/4/3/134371630/6151194.pdfIn PDF document text
    • https://beserozufem.weebly.com/uploads/1/3/4/8/134864657/bunoxuriwobasojipo.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/4106527.pdfIn PDF document text
    • https://vamekatowozi.weebly.com/uploads/1/3/0/8/130814347/kimat-penebikenilodeg.pdfIn PDF document text
    • https://pidivupam.weebly.com/uploads/1/3/4/3/134327465/rerazosirebexik.pdfIn PDF document text
    • https://fitokuzigijot.weebly.com/uploads/1/3/4/6/134681543/mapidepewavazon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc50b2968612547ed78a8d7/t/5fd75e8c96ed101a3e5e95db/1607949965257/repowuxewabigulakexikobo.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/wuxizemonarimilejepa.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/poxipapesudalinoxugefonu.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/escola_de_administrao_cientfica.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/energiesparlampe_e14_kerzenform.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/bodali.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/bookworm_volume_2_free_full_version.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/3d_max_fabric_material_free.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_off0000bb67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB67 5944 bytes
SHA-256: a7609c53e35c111801793a898fbdb1188adcb0d55ca0ebcb2c2c216c5ae9df8a
font_01_sfnt_off0000cf89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF89 11552 bytes
SHA-256: 2bd593012d55ba84aefcebea0724b2571fd6600f276f2125fa04ea204fe7f9b5

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