Malicious PDF — malware analysis report

Static analysis result for SHA-256 fac699eed1ddd5c1…

MALICIOUS

PDF

76.1 KB Created: 2021-05-02 07:58:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d76d454069e4d823cd6360eea8fc90b4 SHA-1: cefc2a1dc3a2bdda85a91c7ff48d7baca0f999df SHA-256: fac699eed1ddd5c145b2d29693348a5531105516c4531024ad05f72c2d438ae8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious, specifically a phishing trojan. It contains numerous embedded URLs, with `https://leonvi.ru/strik?utm_term=canola+oil+chemical+formula` and `http://mafejaruvoje.sportsontheweb.net/66920346969.pdf` being notable examples of potentially malicious destinations. The PDF structure also indicates it functions as a link farm, increasing the likelihood of user redirection to harmful sites.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://leonvi.ru/strik?utm_term=canola+oil+chemical+formula PDF link annotation
    • http://mafejaruvoje.sportsontheweb.net/66920346969.pdfIn PDF document text
    • http://bumaga.bz/novecento_baricco_englishyqhkj.pdfIn PDF document text
    • http://specrazreshenie.com/6855962321nwjn4.pdfIn PDF document text
    • http://gakivako.iblogger.org/sikulelojirezutu.pdfIn PDF document text
    • http://goodsfor.life/baserirefopiplw1ex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417315/normal_604b9d9237e14.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373999/normal_5ff9a3e320976.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481513/normal_6012420892ebe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382781/normal_60092b92ebac0.pdfIn PDF document text
    • http://sadovik.me/tagubikimubegojepejilvrd3v.pdfIn PDF document text
    • http://gadatoreneperil.mygamesonline.org/against_method_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e691ad07-92dc-45fa-af10-8929b4045ede.filesusr.com/ugd/87b9a8_dfd569949abd48dfad5c882c138a244a.pdf?index=trueIn PDF document text
    • https://e7ba4f66-d023-404d-a355-a5b98970f127.filesusr.com/ugd/cac9e4_782755d5c2b54a54b84cc8fbe1977cd3.pdf?index=trueIn PDF document text
    • https://8cff94d3-ecab-4ea5-ad27-d3e67d02fd32.filesusr.com/ugd/2813e2_ec6f1dcb9e144406994dee979d9b16af.pdf?index=trueIn PDF document text
    • http://vepilezora.epizy.com/ssc_gd_result_2020.pdfIn PDF document text
    • http://pubadaxakefiwi.rf.gd/abc_word_book.pdfIn PDF document text
    • https://ed7c5604-ec0f-4ae6-9d22-6d534b57d154.filesusr.com/ugd/1d5a3f_730acccbd26747bbb9f0bba368f5c1ec.pdf?index=trueIn PDF document text
    • http://rupawuvafe.rf.gd/84074269043.pdfIn PDF document text
    • http://fidekejasogam.epizy.com/vubojozumosatufebeferaxe.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2C 4848 bytes
SHA-256: 2e2b053ebca0a22e44b88e02453a3278dbd0effbf9424ad1abc786599a8ad8e7
font_01_sfnt_off0000fe79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE79 11248 bytes
SHA-256: c930ef4e0bf197e0b119e2ba0484661514efc59537deaa7735f94a89a9c0a7ad

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