Malicious PDF — malware analysis report

Static analysis result for SHA-256 5624618bd2e32cf7…

MALICIOUS

PDF

77.9 KB Created: 2021-04-03 05:56:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8737ffaaff04ce9268ad66d021bc556 SHA-1: 28a6cf26887abee6fbe533e84755b63ed4ad5f8e SHA-256: 5624618bd2e32cf71b99a0f220b7c4a239e45106269ad5161fe7833482dffe96
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a phishing or trojan-like behavior. The PDF contains a large number of external links, suggesting a link farm or SEO manipulation tactic to direct users to potentially harmful websites. While no scripts were explicitly extracted, the presence of embedded URLs and the PDF structure itself are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/wix?keyword=mole+mass+worksheet
    • https://pomulopegodetom.weebly.com/uploads/1/3/1/3/131384256/vazoma.pdf
    • http://gratoraama.space/dd_alignment_test_easydamusn05qm.pdf
    • https://cdn.sqhk.co/rikopekela/VgiDhdO/winklevoss_brothers_height.pdf
    • https://cdn.sqhk.co/zusisoko/jjhavuC/49939738075.pdf
    • http://gnatural.space/2x2x2_rgb_led_cube_arduinosl8yn.pdf
    • https://cdn.sqhk.co/najafizox/shhWegg/lekaduketaxe.pdf
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdf
    • http://martakkord.ru/how_long_does_it_take_to_make_bread_in_cuisinart_bread_makerdkzwv.pdf
    • https://tumebadov.weebly.com/uploads/1/3/4/8/134863232/2818603.pdf
    • http://help-bluebadgecenter.com/wayne_dalton_garage_door_opener_program_keypadbyw8j.pdf
    • https://cdn.sqhk.co/ranetixeba/jaKibw7/13562212739.pdf
    • https://cdn.sqhk.co/viforoge/6ggheji/zunelotelererobarililab.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://17851959-1482-4b49-8222-7b7b0c628459.filesusr.com/ugd/3cb679_b2181688cc4d4da2afef6697e13c0947.pdf?index=true
    • https://59bb578d-b312-442a-858b-1a1a54b18a6c.filesusr.com/ugd/c79b1c_1514171bfb7e4d518fafefa63ca2acb4.pdf?index=true
    • https://254a6a59-343e-4b7e-907c-c4819e171fff.filesusr.com/ugd/decf6f_62b47bdd61c641b6a71f24744580acde.pdf?index=true
    • https://d8acad56-eb9a-42d1-a06c-a695c5b02328.filesusr.com/ugd/0ad6c7_1ba849efa4f3443fb6c2dee6b5334b03.pdf?index=true
    • https://9a4b5e96-23fe-4021-9525-787506808755.filesusr.com/ugd/b3318b_d5e06fd3baf64be6818237b25d544841.pdf?index=true
    • https://d7b50aa0-fea3-4edc-ba9e-4ed0094b0c60.filesusr.com/ugd/7f614e_5204ab7777d9485aa6638b5d2e2b6fd3.pdf?index=true
    • https://f38be386-5799-403b-9303-fb121113655a.filesusr.com/ugd/6f1aa7_3c7d1a9b94e9485face8770ef352b4ae.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8f5.bin
345d9ed2c6e84367e1bf956085b88d983b33d622ee62be1bd76c651b004afb6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F5 4720 bytes
font_01_sfnt_off0000f90e.bin
f5a195926b61ae22a457a266b4a52a5d3c39470a21cd23ff9beb8499b88bc8e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF90E 10464 bytes
font_02_sfnt_off00011c8e.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C8E 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.