Malicious PDF — malware analysis report

Static analysis result for SHA-256 fee71f44a049eb73…

MALICIOUS

PDF

79.6 KB Created: 2021-03-13 18:30:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 428b696b0c6b448e779217eb031e5cb2 SHA-1: db267c41fb98f5554fc3938d92a41ebf2083ce45 SHA-256: fee71f44a049eb73aa559203a93e269d442e86569e6a65616c9dfec9ae870735
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, with one primary URL pointing to a phishing-related domain. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm suggest a phishing or malware distribution attempt, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dafemum.ru/123?utm_term=chaahat+ek+nasha+film PDF link annotation
    • https://dazuzoboda.weebly.com/uploads/1/3/4/0/134017564/geruk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371791/normal_5fdeafd622226.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491965/normal_5fc8dd9ed44f1.pdfIn PDF document text
    • https://gozizakodo.weebly.com/uploads/1/3/2/3/132303179/7088206.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419003/normal_602786d93fff7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414847/normal_5fce83dc290a0.pdfIn PDF document text
    • https://jamiwimavebu.weebly.com/uploads/1/3/1/4/131453695/fbca21c3b2f70.pdfIn PDF document text
    • https://mafenipo.weebly.com/uploads/1/3/4/8/134879688/df888.pdfIn PDF document text
    • https://bemebedutor.weebly.com/uploads/1/3/4/6/134624352/3741852.pdfIn PDF document text
    • http://esplus.pro/liwulatutex8ayo.pdfIn PDF document text
    • https://cdn.sqhk.co/wajuletixex/idiccqi/ups_customer_center_goldsboro_nc.pdfIn PDF document text
    • https://cdn.sqhk.co/kososojog/jaujcHu/48793941647.pdfIn PDF document text
    • http://glawerry.online/introduction_to_machine_learning_with_python_a_guide_for_data_scientists_freew9s5x.pdfIn PDF document text
    • http://rixorevu.getenjoyment.net/diccionario_derecho_romano_gratis.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/47367883065.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490273/normal_600506b84b54c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370746/normal_5fe2c12206153.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419437/normal_5fe54e8315a8a.pdfIn 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
    • http://vamavaremimot.atwebpages.com/jenn_air_double_wall_oven_installation_manual.pdfIn PDF document text
    • http://nejesezape.myartsonline.com/gramos_es_igual_a_mililitros.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_off0000e821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE821 4676 bytes
SHA-256: 81558a68feb4f67c36ca60354930743a2b189bb8b4186768c9bbf39b1dceade2
font_01_sfnt_off0000f7d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D3 12044 bytes
SHA-256: 09e8aba6eeb69bad2c6fcc5e475cf9d9b20acdafe61b4d473f9e88d971289577
font_02_sfnt_off00012115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12115 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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