Malicious PDF — malware analysis report

Static analysis result for SHA-256 46d2c64d29942fd6…

MALICIOUS

PDF

82.7 KB Created: 2021-01-19 06:47:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e951db3fb8e918cf1a7524459fc4a74b SHA-1: b45d1cd059a9f37384bcd29e5158b7834e07bdfa SHA-256: 46d2c64d29942fd6cc73993777fd6ddec33e5f2e8335386cf8ef0fb5b78d39b2
126 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. It contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent, likely to redirect users to malicious sites or download further payloads.

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 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/123?utm_term=ifrogz+resound+wireless+headphones+manual
    • https://cdn-cms.f-static.net/uploads/4449205/normal_5fbf4dd9601f9.pdf
    • https://cdn.sqhk.co/xekejegixawo/K8iiJgh/maps_for_minecraft_pe_minemaps_apk.pdf
    • https://cdn-cms.f-static.net/uploads/4478670/normal_5fbf0c83a84bb.pdf
    • https://cdn-cms.f-static.net/uploads/4487658/normal_5fbf600a15247.pdf
    • https://static.s123-cdn-static.com/uploads/4481285/normal_5fec577832a01.pdf
    • http://xabidewukolesas.66ghz.com/one_page_website_template_bootstrap_3_free.pdf
    • https://cdn.sqhk.co/jobebakegip/6Cjhvhg/orange_tree_leaf_tips_turning_brown.pdf
    • https://cdn-cms.f-static.net/uploads/4403936/normal_5fe8f84e96990.pdf
    • https://cdn-cms.f-static.net/uploads/4490754/normal_5fb4d452564ce.pdf
    • https://cdn-cms.f-static.net/uploads/4456399/normal_5fab5cffbcfa4.pdf
    • https://cdn.sqhk.co/nokotadi/JifeIqL/canadian_country_music_artists_2018.pdf
    • https://static.s123-cdn-static.com/uploads/4486743/normal_6004f7b4e7cf4.pdf
    • https://static.s123-cdn-static.com/uploads/4428335/normal_5fc5bdad30272.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jemazejodep/logistic_regression_reporting_results_example.pdf
    • https://s3.amazonaws.com/sedimeraxufi/mario_kart_double_dash_hd_texture_pack.pdf
    • http://jisufuwoj.epizy.com/christmas_carols_piano_sheet_music_advanced.pdf
    • http://rixexoto.rf.gd/movijazowa.pdf
    • http://wizebefekeb.epizy.com/8899845295.pdf
    • https://s3.amazonaws.com/vatakefojunib/butterfly_dance_yanni_piano_sheet_music.pdf
    • 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_off0001069e.bin
ab0ee3cb467f2126e5de8b600995ea2639500caed27819762dd0d859cb9048b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1069E 5536 bytes
font_01_sfnt_off00011966.bin
915a9b44954774a980c1b1b01c1c3c345d94b770651a8bc5e30fab7e6d3560a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11966 10480 bytes

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