Malicious PDF — malware analysis report

Static analysis result for SHA-256 1efe47972a6c1faf…

MALICIOUS

PDF

77.2 KB Created: 2021-03-17 03:14:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1adf18c8ba5c79a7b53624e135ff4f53 SHA-1: d8a28784202312d18af3643cee84aeaf60c3d6c0 SHA-256: 1efe47972a6c1faf56d551ef5e6d86b7ab9fe65cec549f67955bff45d89eff29
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, flagged as a PDF link farm for SEO purposes. The primary malicious URL identified is 'https://soxebez.ru/award?keyword=alelo+genetica+pdf', which likely serves as a distribution point for further malicious content or phishing attempts. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=alelo+genetica+pdf
    • https://cdn-cms.f-static.net/uploads/4366024/normal_600f13d4a7bed.pdf
    • https://cdn-cms.f-static.net/uploads/4460057/normal_5fea293170ed5.pdf
    • https://cdn.sqhk.co/rufadexu/gH1TEge/nopufizusulivadenam.pdf
    • https://cdn.sqhk.co/tulotunofuz/hgHhbwA/lagesewuretijiji.pdf
    • https://cdn-cms.f-static.net/uploads/4465259/normal_6041798624d08.pdf
    • http://gukazuz.iblogger.org/format_factory_exe_for_pc.pdf
    • https://static.s123-cdn-static.com/uploads/4466135/normal_5fd0572828c6a.pdf
    • https://static.s123-cdn-static.com/uploads/4380082/normal_6000a754ede74.pdf
    • https://cdn.sqhk.co/vulovosovem/eKficYE/andrew_walker_pac_12.pdf
    • https://static.s123-cdn-static.com/uploads/4489843/normal_60021a4ae2d8a.pdf
    • https://static.s123-cdn-static.com/uploads/4501383/normal_5ff3b9e2a1e60.pdf
    • https://cdn.sqhk.co/nivunufozub/hg4x3ih/sago_mini_babies_jack_the_rabbit.pdf
    • http://feziweninepiv.iblogger.org/corrupted_ashbringer_guide_wow.pdf
    • https://static.s123-cdn-static.com/uploads/4383573/normal_5fe5c2e45ba20.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://933527c5-e005-4225-a3aa-05fee46c7696.filesusr.com/ugd/b51dd5_e4301536e01e4c50a0e8204cd42972ff.pdf?index=true
    • https://923a8ca3-316b-4844-b38f-9bc955ad4852.filesusr.com/ugd/312e0e_f51ec503c4cb4e12804f84515e6329ce.pdf?index=true
    • https://6fd4412c-3e6e-4f21-a9af-8137ffc6c0d9.filesusr.com/ugd/03469c_2d222f8637f744ffb25144810efa100a.pdf?index=true
    • https://aa6d2f86-95e2-42cc-897e-6bbd71c3a116.filesusr.com/ugd/78daac_d873eade14bc48619d08d08e498d2583.pdf?index=true
    • https://2a983b51-2e13-4971-8c1f-a5bca3ab4353.filesusr.com/ugd/e1a791_aa0887bfd3424aa0abc575fe34b2e845.pdf?index=true
    • http://fonavaserago.epizy.com/18370181353.pdf
    • http://digupusulufo.epizy.com/how_to_remove_front_panel_from_kenmore_stackable_washer.pdf
    • https://bef89f6e-6323-4b84-ad9d-a44490bfcc4f.filesusr.com/ugd/96768c_e2a6f4fb46a940e9a24ce7da53130f2c.pdf?index=true
    • https://c3e810f9-371e-40b9-9a0b-4695a496ec77.filesusr.com/ugd/2c7c49_01d5a6ad86da41f0b807ea30a2f6d016.pdf?index=true
    • https://eda93683-a6ca-45e9-8056-ca7adea7f1dc.filesusr.com/ugd/d655db_63aa7f3d57a34a72a0219aa2d3e69608.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_off0000e856.bin
79b0cd3c52d544dd4a557a22bb6650998b7092c3e5a1a3cbec2fd1f1e0da494b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE856 5036 bytes
font_01_sfnt_off0000f99a.bin
aab740d611e0c101e480797fdcbe1a888bed0ef35ea70ce487afaf008968a9d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF99A 14520 bytes

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