Malicious PDF — malware analysis report

Static analysis result for SHA-256 1561b834d3acbb35…

MALICIOUS

PDF

68.4 KB Created: 2020-12-15 09:40:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a2e29d6e4adf85eddda81a5410e1af59 SHA-1: dc689ca347dd8e6d0ff111f21d88f83b6ae492df SHA-256: 1561b834d3acbb35e983a199dbd6e53303cce96f28651da76deefdbb9709209d
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. The primary malicious URL, 'https://traffking.ru/123?utm_term=foxfire+pdf+7', suggests a phishing or scam campaign. While no scripts were explicitly extracted, the PDF structure and the presence of external links strongly indicate an attempt to redirect the user to a malicious site, likely for credential harvesting or malware distribution.

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://traffking.ru/123?utm_term=foxfire+pdf+7 PDF link annotation
    • https://kugodago.weebly.com/uploads/1/3/4/4/134491336/e8631.pdfIn PDF document text
    • https://jewelilug.weebly.com/uploads/1/3/4/3/134331877/xifimaxegatop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410216/normal_5fbc8e8b159df.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/lizuseguwix/48292224833.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/26273536333.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/ruvikemolerasejolulaxoti.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/platform_bed_with_drawers_twin_xl.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/list_of_translucent_minerals.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/auditory_discrimination_worksheets_for_grade_1.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/dsc_rx100m6_help_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc30b2524b06a7eb30d4f82/t/5fce588bd336b863f0f378b3/1607358604195/pajoboxodorovubeki.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbffc42bda9c57a97b92422/t/5fc15e573570fb44d135de2f/1606508120773/piers_anthony_incarnations_of_immortality_download.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/danuvimupiromulagemuvedu.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_off0000cf5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF5C 4720 bytes
SHA-256: cabe4764f6d025060819821b15525009b7b51e4ab1b7dde2ea8ea3384923a28f
font_01_sfnt_off0000df8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF8C 11080 bytes
SHA-256: d4085764fec6ee810a584f526ebf48a13e10445ee4cd159471d858dc4d2bb8ae

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