Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3ca95fe48b6f293…

MALICIOUS

PDF

88.4 KB Created: 2021-04-07 04:17:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7aca7502644e49ae15da77741fc0e455 SHA-1: 100bfee851a4c692c081d358cf55ccbe59b5c7e9 SHA-256: e3ca95fe48b6f293c7e38c453f67efa08145f28ba148032a064db46db5a58f0a
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous external URIs, with a primary suspicious URL being 'https://jumiwimov.ru/wix?keyword=sandisk+sansa+m240+1gb+mp3+player+manual'. The document body, though heavily obfuscated, appears to be a lure related to device manuals, suggesting a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jumiwimov.ru/wix?keyword=sandisk+sansa+m240+1gb+mp3+player+manual
    • https://cdn-cms.f-static.net/uploads/4470223/normal_6062d3a6abf5b.pdf
    • http://lumejaramelu.mygamesonline.org/74116286385.pdf
    • https://cdn-cms.f-static.net/uploads/4369933/normal_60660c8d83384.pdf
    • https://cdn.sqhk.co/likafupat/iccjfja/hobby_lobby_furniture_end_tables.pdf
    • https://cdn.sqhk.co/sitopizol/Ohggfjg/tabiw.pdf
    • https://cdn-cms.f-static.net/uploads/4380675/normal_5fd9be5c9b89d.pdf
    • http://wozilimesiz.mypressonline.com/how_much_does_a_marketing_manager_make_in_texas.pdf
    • https://cdn.sqhk.co/vefomatakin/i3Cgcq7/drum_kits_for_sale_on_ebay.pdf
    • http://lorozetuwivu.medianewsonline.com/fourier_analysis_and_nonlinear_partial_differential_equations.pdf
    • https://cdn.sqhk.co/jabuvilir/jcggPjg/2018_best_games_for_android.pdf
    • http://xanejog.medianewsonline.com/buralinutapem.pdf
    • https://cdn-cms.f-static.net/uploads/4458854/normal_60663a241346c.pdf
    • http://burivuvuju.medianewsonline.com/vimutomawijototaw.pdf
    • https://cdn-cms.f-static.net/uploads/4376382/normal_6056efae617ee.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/126a14c1-d936-4497-be4f-1d0d06bd9d27/linksys_ea4500_manual_espaol.pdf
    • https://9e1bd277-069e-4713-bdcc-1ab96cf790c3.filesusr.com/ugd/5fd2af_0dbe4bfb7b6d41c0b278abdf2336af1e.pdf?index=true
    • http://jokosen.atwebpages.com/d-in_unlock_tascam_cd-rw900sl.pdf
    • https://61df3396-90b5-4b69-a3ae-475c9da6ebc5.filesusr.com/ugd/516574_9882151cf70f467ebd03fd3782754bee.pdf?index=true
    • https://uploads.strikinglycdn.com/files/0f01923f-c003-4001-8c2e-d3fe8e91c0c7/gozuzubavolenawop.pdf
    • https://uploads.strikinglycdn.com/files/5ebc793a-ba7c-435b-9570-b1ed4344f248/metaphor_used_in_romeo_and_juliet_act_1.pdf
    • https://fa53e508-d88d-41cb-897c-7a5b6f1bfcc3.filesusr.com/ugd/361045_4ac8a105c0a7493ab6d28071257b95b9.pdf?index=true
    • https://3caa4030-7dd6-4be4-8a8a-e1981c45b3cd.filesusr.com/ugd/704988_9f141aa68e2644aabdd251e59761b46e.pdf?index=true
    • https://uploads.strikinglycdn.com/files/cbdd2822-3c8f-46dc-a451-41f83a2d8f82/2010_dodge_caliber_dash_light_meanings.pdf
    • https://uploads.strikinglycdn.com/files/e9a7d891-2fdf-49d5-b7cb-aee78bd639a6/technical_writing_examples_about_yourself.pdf
    • https://b354d503-40d1-4c97-84b4-bc0b16c12f35.filesusr.com/ugd/8c7d07_0478630c969a42c690bf3e94ea287d10.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_off0001179f.bin
da79c58c203d710dfcd72ebe836f82677f0480408b7b4c78b8156b18db213f36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1179F 6268 bytes
font_01_sfnt_off00012cec.bin
3d8f9ad5f398cc8bde9acbc18e09fb555509d90115f2a67a2a4ea61b203ad03c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12CEC 11384 bytes

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