Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d47ea3d9a69b9bd…

MALICIOUS

PDF

83.2 KB Created: 2021-03-29 04:33:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71239fb3ce481449744746c66e3b3951 SHA-1: 7fb5229ee867cac05abe339693d7489f4ee1e0ad SHA-256: 2d47ea3d9a69b9bd51fd077010a5f435d40fb1a6726ed6351fff5737cc3bf165
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing campaign. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and 'Qt', indicating it was likely generated by a tool rather than being a legitimate document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/wix?keyword=asus+p5q+deluxe+modded+bios
    • http://xelamoxadavas.mywebcommunity.org/ideal_gas_law_worksheet_answers_chemistry_if8766.pdf
    • https://cdn-cms.f-static.net/uploads/4368964/normal_601f0f0538379.pdf
    • https://cdn-cms.f-static.net/uploads/4404529/normal_6039d642bdd2c.pdf
    • http://zakosemej.mypressonline.com/de_que_se_trata_la_obra_la_riqueza_de_las_naciones.pdf
    • https://cdn-cms.f-static.net/uploads/4387808/normal_6031d0ec539e1.pdf
    • http://xupokaxe.medianewsonline.com/evan_moor_daily_science_grade_2.pdf
    • https://cdn.sqhk.co/zofizitene/uy8pghp/super_wings_jett_run_mod_apk_2020.pdf
    • http://ruguwafe.scienceontheweb.net/a_christmas_carol_script_short_version.pdf
    • https://cdn-cms.f-static.net/uploads/4461744/normal_605f2e1866855.pdf
    • https://static.s123-cdn-static.com/uploads/4427282/normal_5fd09577604f8.pdf
    • https://cdn.sqhk.co/rexukewanej/gpTGjaG/2015_mustang_v4_0-_60.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://56a7be67-7dca-40da-a973-69ad719fb73b.filesusr.com/ugd/fedf23_2ddef0d073c64af8a28543fa8e757edb.pdf?index=true
    • https://uploads.strikinglycdn.com/files/07e0f66c-9609-43d4-b380-c952c5f373d2/gezedatalokaja.pdf
    • https://e4586023-485a-43f1-9451-2d404684c5b7.filesusr.com/ugd/95ff22_bb25981225ff4ea49580a6f656be7a87.pdf?index=true
    • https://5c09c65f-4728-49e3-9562-8692e696fc4f.filesusr.com/ugd/32acb1_b8f80efd90f5415a85c3571c715415b2.pdf?index=true
    • https://s3.amazonaws.com/robumuduluwise/vuzudixuke.pdf
    • https://fc060a1e-8c1d-4b7d-bafd-75f79d4c6355.filesusr.com/ugd/c0a468_0249d3c23379414186459098073b1519.pdf?index=true
    • http://vovakupalujum.onlinewebshop.net/attestation_d_hbergement_en_anglais.pdf
    • https://c01188fd-d8af-4b86-846b-090f7ecd58d8.filesusr.com/ugd/9058e5_f09275375e3846239672e5bbc756a20b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c6cd0c59-0f29-4ab3-9005-607b23feaf65/dell_xps_8500_updates.pdf
    • https://s3.amazonaws.com/legenapi/67942755905.pdf
    • https://uploads.strikinglycdn.com/files/69f834ec-e722-4f73-8846-f6f3569c2c53/64836754291.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_off000105a2.bin
ef47e8cb26612136ebfa1dfb569d3a31abe2bfa65fbfeeabb0987d5e60a075ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105A2 5244 bytes
font_01_sfnt_off00011770.bin
cde210463669106821892ddafb4c1d7eabf9976dce95fec35e33a3a9cca20f8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11770 11332 bytes

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