Malicious PDF — malware analysis report

Static analysis result for SHA-256 568981c83b388653…

MALICIOUS

PDF

78.5 KB Created: 2021-03-07 15:41:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 94b1e0d0575701e51f65080ebd80f113 SHA-1: 51afb952f2b628f0c65d438f4524e95b334608ee SHA-256: 568981c83b388653b388ae121f34be650ea223b70e8f70ba9efd1dcdbbc580ea
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains a large number of external links, many pointing to disposable domains, suggesting an attempt to obscure the true destination or distribute content across many sites. The heuristic 'SE_MFA_LURE' indicates the document likely attempts to harvest credentials or session tokens by mimicking multi-factor authentication prompts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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/award?keyword=linksys+e1200+router+setup+without+cd PDF link annotation
    • https://tidosivapozagul.weebly.com/uploads/1/3/4/3/134390518/fejeligemevunagig.pdfIn PDF document text
    • https://dupemokuko.weebly.com/uploads/1/3/4/7/134759865/551facfe0535b4.pdfIn PDF document text
    • https://wadonado.weebly.com/uploads/1/3/4/6/134677460/mizugogevi.pdfIn PDF document text
    • https://degegoza.weebly.com/uploads/1/3/0/8/130873855/waxupigezurozub_latux.pdfIn PDF document text
    • http://zeweduzu.iblogger.org/71532876560.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d82d9716-b4d3-4e1f-8ef1-dc1cb156e1a8/rain_bird_esp-rzx_manual_portugues.pdfIn PDF document text
    • https://1a2149e7-ca7f-4e7c-a584-0e483de6f3af.filesusr.com/ugd/9219f8_b9ea2e80ec3b4594ba27861192a3cdd2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nowokil/simple_flower_coloring_sheets.pdfIn PDF document text
    • http://dudulexo.epizy.com/how_to_find_a_color_from_an_image.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/298bd074-28f9-42a3-bf7c-687216a65bb4/45339805206.pdfIn PDF document text
    • https://8fa10226-37c2-454d-bd65-ced70ecbf0c4.filesusr.com/ugd/c34aa9_3502080b39784e33909b46a192620ba5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed2c50d0-aa85-498f-b806-de1dee2e7e59/limapid.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/audio_switcher_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd6c022d-ec21-4c0b-92eb-bf5a1a9f970b/how_to_set_a_haier_fridge_freezer.pdfIn PDF document text
    • http://bijamujijupife.epizy.com/42535847297.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcc88518-a05a-425e-8683-4ef9ba296f97/how_to_make_12v_lithium_ion_battery_charger.pdfIn PDF document text
    • https://bac325b5-3710-4a60-ba01-c1ac5e8a7650.filesusr.com/ugd/c111de_6d1febcb076b43eebadaaf516af7a767.pdf?index=trueIn PDF document text
    • http://guwuwusiva.rf.gd/how_has_soccer_affected_the_world.pdfIn PDF document text
    • https://77da94c0-0f0a-445b-87af-e489a0b5ef66.filesusr.com/ugd/db1da1_01c25789795f474792e0bc6b3f55dba0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e562d394-cdfb-489a-b9c9-afc0c2057cac/37115832663.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DE 5444 bytes
SHA-256: 6391ff54ecda3204a22ff4a1f6aa5948341d821b9fe8939c559ccbec99a583ce
font_01_sfnt_off00010984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10984 10184 bytes
SHA-256: 9b87f70a2ad510dcf79ad63cdc2af91ecf4a4e67528c7236650f1f00bd97d819