Malicious PDF — malware analysis report

Static analysis result for SHA-256 6890f53bc4713afd…

MALICIOUS

PDF

70.9 KB Created: 2021-03-04 13:27:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 56a02583bf82e571aaa11fdbae2d4c8d SHA-1: 4b044f1ffb331a061badca551016693e9de21a1f SHA-256: 6890f53bc4713afd3907ef04804686e98c1ad4903c5aa41ec07fc0bbace6484a
184 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or SEO spam. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, and 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' confirm its malicious nature. The document body is heavily obfuscated, but the presence of URLs suggests an attempt to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9321

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 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.
  • 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
  • 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://nipisod.ru/award?keyword=hot+briquetted+iron+production PDF link annotation
    • https://cdn.sqhk.co/terasovo/HiehKii/likisaxate.pdfIn PDF document text
    • https://cdn.sqhk.co/mawedabe/ICvPihb/69439747457.pdfIn PDF document text
    • https://cdn.sqhk.co/julukimesof/BhbRhfo/dokefuratimefatiridimoz.pdfIn PDF document text
    • https://feditesar.weebly.com/uploads/1/3/1/4/131483001/6560236.pdfIn PDF document text
    • https://cdn.sqhk.co/xeposetuge/HJjbifB/snake_zone_io_game.pdfIn PDF document text
    • http://delinapod.mypressonline.com/maytag_quiet_series_100_dryer_not_heating.pdfIn PDF document text
    • https://wokopapun.weebly.com/uploads/1/3/5/3/135388848/2112863.pdfIn PDF document text
    • https://cdn.sqhk.co/lixabanitav/iggfjIK/dasigo.pdfIn PDF document text
    • https://deremorukoj.weebly.com/uploads/1/3/4/4/134490203/2985960.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://eecb1da5-82b7-48ef-90e5-6a20895c07e7.filesusr.com/ugd/88a84f_eb0b4a5b2c97442992a74e012bd2ca8d.pdf?index=trueIn PDF document text
    • https://69cf8a46-0d3d-4b71-8fd1-93df925da18e.filesusr.com/ugd/e4064d_38009da995294e2ca3e6026aaf5529b3.pdf?index=trueIn PDF document text
    • http://jufomotapi.epizy.com/41945172335.pdfIn PDF document text
    • https://856cb5e6-6c81-45ce-9604-b57907a15cd2.filesusr.com/ugd/cc3ca9_9966bf0e2d29423981d7c8c2b6731e65.pdf?index=trueIn PDF document text
    • http://tapoloferazuziw.atwebpages.com/epson_workforce_wf-2630_not_printing_properly.pdfIn PDF document text
    • https://cbc32c15-d2bb-4d0e-b575-58d83b80a583.filesusr.com/ugd/bca722_0b914b0d22e9403e9491591bce7a2f16.pdf?index=trueIn PDF document text
    • https://917ed8d3-8a9f-4c5c-a3ad-554e533308ad.filesusr.com/ugd/a4e402_ca5c0d1ef04846bcb0954fc76ea3abe6.pdf?index=trueIn PDF document text
    • https://a7da3e60-63c8-46c1-a846-eab7df628ed2.filesusr.com/ugd/bba345_12eed001f9b54cdba9523dd8939cee8b.pdf?index=trueIn PDF document text
    • http://fukatotapi.epizy.com/ionic_bonds_gizmo_assessment_question_answers.pdfIn PDF document text
    • https://696f1bd8-06c3-47a7-a8f7-e83e17ec8d18.filesusr.com/ugd/5ad03d_0b628d94af634ed7a0f87cdfa0d2170d.pdf?index=trueIn PDF document text
    • http://xarezebabanadot.epizy.com/samsung_55-inch_q80t_4k_qled_smart_tv.pdfIn PDF document text
    • https://3f9320ff-391d-49df-b192-c557e211a93c.filesusr.com/ugd/469aea_1776bd786b464ea795f673073e7c725f.pdf?index=trueIn 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_off0000dfe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE9 4876 bytes
SHA-256: b9585f0fe9cc8e1c98070db3b765859b39234277d4af969f1fb8dcde8ceecdad
font_01_sfnt_off0000f07f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF07F 10472 bytes
SHA-256: 93c2847dd2d332617314b337ef8b7bec2f7e5dd50a3b482bf82ece06e24ea3c6

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