Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e9ec84ad552db8e…

MALICIOUS

PDF

79.9 KB Created: 2021-03-01 18:17:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9f9c5aaf4fb5ad00f3cdf14d2bf501ba SHA-1: 100aaf688ff8bf44c9810d35df6aee18c2325f85 SHA-256: 0e9ec84ad552db8e074e0904c47361ca1c12bf0e069efc7351e523fc74758f92
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, suggesting a malicious intent to manipulate search engine results or distribute further malicious content. The ClamAV detection and ML classifier strongly indicate maliciousness, specifically flagging it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or content distribution scheme.

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://botokaw.ru/strik?utm_term=harga+kamera+dslr+sony+a350 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4424009/normal_5fe4fbcda385f.pdfIn PDF document text
    • http://kamini33.ru/cavalcadepublishing_com_balancing_chsj0u5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387816/normal_600fc717dad74.pdfIn PDF document text
    • https://cdn.sqhk.co/modesinilofe/je2hf2b/pekunasenoruzivosewari.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486037/normal_5ffa93005b6ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391925/normal_5fdc7197762d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387806/normal_60353e7dd039e.pdfIn PDF document text
    • https://cdn.sqhk.co/moxufupog/mjiXDji/light_balloons_in_sky.pdfIn PDF document text
    • http://verifedform.com/sinegabosowigupavirufijoguib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464878/normal_5fd8464037710.pdfIn PDF document text
    • https://nedugapepo.weebly.com/uploads/1/3/4/2/134265444/6720093.pdfIn PDF document text
    • https://cdn.sqhk.co/vilomikov/t3lt6gg/pink_and_orange_ombre_glitter_nails.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495994/normal_601cc8de905a6.pdfIn PDF document text
    • https://cdn.sqhk.co/luwesefizi/gggdgiQ/drinking_balls_hurt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448720/normal_600c21452dc63.pdfIn PDF document text
    • https://cdn.sqhk.co/vozevadijut/jhi9Chb/kagek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f8ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8AE 5704 bytes
SHA-256: 083e590a29fdd9c175c84202248aebe97cd5298d23369663c82378602d3cff40
font_01_sfnt_off00010c09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C09 11360 bytes
SHA-256: 33cbbc515d10ee1d8f2b187e0c84293b9def4e85271f39d99a8170cee04872f7

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