Malicious PDF — malware analysis report

Static analysis result for SHA-256 46c2e4db2a964666…

MALICIOUS

PDF

73.3 KB Created: 2021-03-10 15:05:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ade4a664305a9510a7d7e93b22e34af SHA-1: 26621c67419d12cb5521e5bd41427b41b0f777b0 SHA-256: 46c2e4db2a9646660219d21ce94e54f3e07a4628890e11f8e74994ba30b06787
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are numerically or generically named, suggesting a link farm designed to manipulate search engine results or redirect users. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/award?keyword=le+millionnaire+automatique+david+bach+pdf
    • http://sowoxapexemex.sportsontheweb.net/43192779884.pdf
    • https://fuwurobo.weebly.com/uploads/1/3/0/8/130814642/4269071.pdf
    • http://lexamopelezun.mywebcommunity.org/craftsman_7-1_4_in._miter_saw_with_laser_trac_manual.pdf
    • http://nigoguno.scienceontheweb.net/87091511820.pdf
    • https://kubamugikogili.weebly.com/uploads/1/3/4/5/134508843/kujakoxegorabulusoba.pdf
    • https://cdn-cms.f-static.net/uploads/4369763/normal_6019515f9590c.pdf
    • https://malilojomatade.weebly.com/uploads/1/3/4/3/134354128/53d5b86d0061b26.pdf
    • https://cdn-cms.f-static.net/uploads/4447267/normal_5fe9cb537b9da.pdf
    • https://cdn-cms.f-static.net/uploads/4469841/normal_5fd66106765de.pdf
    • https://vesexifog.weebly.com/uploads/1/3/4/4/134491049/susatovuvumobawejof.pdf
    • https://kazigujexumakul.weebly.com/uploads/1/3/4/3/134320364/2751875.pdf
    • http://tugokutuli.scienceontheweb.net/which_sewing_patterns_are_best_for_beginners.pdf
    • https://tumalurezap.weebly.com/uploads/1/3/2/6/132696080/vojomevimetetos-nogukunozekox-wologasir-runox.pdf
    • http://dazolovegom.mygamesonline.org/waxat.pdf
    • https://simalono.weebly.com/uploads/1/3/1/8/131856945/23daec.pdf
    • https://nezogifoxo.weebly.com/uploads/1/3/1/6/131637357/garir-sepemisar.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://7f993087-45f6-41f4-96e5-9dcaca18fb91.filesusr.com/ugd/9a92dd_eb6f645a634a4ae7939863166c118c43.pdf?index=true
    • http://kuxoxokazutuv.myartsonline.com/butodisekizomegalapixiben.pdf
    • https://d6aab468-caab-4d9e-910f-d3bf64ae4104.filesusr.com/ugd/5438e3_c807470c2dde44e4a8c1887b47bb57ea.pdf?index=true
    • http://josuxak.atwebpages.com/sub_zero_appliance_repair_toronto.pdf
    • https://98350ace-7ac4-4f38-a9d9-579fdad8050b.filesusr.com/ugd/9b2d9b_0b850038d6a24d6d93021bd7f9bb7140.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000def7.bin
ba6ee12b7060d4bbd815906ed750642144a4a90711db9a77f004c66aadd5a3a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF7 5484 bytes
font_01_sfnt_off0000f175.bin
2cb1ece12c524b8c27c06cb388d0451e045375eb381c4ddaa58dfb9fee808dc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF175 12068 bytes

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