Malicious PDF — malware analysis report

Static analysis result for SHA-256 38b43184bb651adf…

MALICIOUS

PDF

98.3 KB Created: 2021-03-06 19:14:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 83fa8868d1a488bfbb53d1f3b98e150c SHA-1: f469708b4a494fbc4ffba6a7510acd5b1057fffe SHA-256: 38b43184bb651adfe9ed916f51423c15224b1f6b63c652a2c8a3ce3b7b53ede7
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting it functions as a link farm for phishing or malware distribution. The primary malicious URL identified is https://maypoin.ru/wix?keyword=siglo+xix+en+espa%25C3%25B1a.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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
  • 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://maypoin.ru/wix?keyword=siglo+xix+en+espa%25C3%25B1a PDF link annotation
    • https://kuxiwidozerapi.weebly.com/uploads/1/3/4/7/134728536/c53b361c8840d76.pdfIn PDF document text
    • https://vuminuzatadabem.weebly.com/uploads/1/3/4/3/134311796/8866273.pdfIn PDF document text
    • https://felogenapugiro.weebly.com/uploads/1/3/5/3/135327705/579b01ff.pdfIn PDF document text
    • https://gupijevud.weebly.com/uploads/1/3/1/4/131407369/102f0.pdfIn PDF document text
    • https://rukupapafi.weebly.com/uploads/1/3/0/7/130739745/3234944.pdfIn PDF document text
    • https://bawilizutiv.weebly.com/uploads/1/3/4/4/134477944/a31fc4acff25e6.pdfIn PDF document text
    • http://lavijowonuxogu.22web.org/what_would_today_be_in_the_julian_calendar.pdfIn PDF document text
    • http://vemasujananexu.22web.org/tyrolia_adrenalin_binding_review.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://667abc8f-92ca-45d9-bc9d-789c80a68858.filesusr.com/ugd/dcd78f_85914c9cb71a4210816ba25d3aa1abae.pdf?index=trueIn PDF document text
    • https://e8e87dc5-637d-47ba-9de6-e7d98d123d78.filesusr.com/ugd/a69a03_edeee2434d9447cd8bbc07840c288870.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bcf2fe9-6998-48f7-a527-b9688fe82d3d/85422605338.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1a0285d-7c29-434d-a6a8-2f6a75f184ce/lofotu.pdfIn PDF document text
    • http://kodexogezetegir.epizy.com/bharat_zinda_song_ringtone.pdfIn PDF document text
    • https://7605d98d-8b17-4a41-9383-f5c8d5af9bcc.filesusr.com/ugd/2bed4c_887a509e951545bc8109e0dde834b0c4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/44095426-927d-41b7-b571-1752f139587b/sound_blaster_evo_zx_software.pdfIn PDF document text
    • https://a7da3e60-63c8-46c1-a846-eab7df628ed2.filesusr.com/ugd/bba345_b414e4706af34a8caa1b2cb1a42c94a1.pdf?index=trueIn PDF document text
    • https://c3373aeb-ed74-4f2d-b631-fa679e0a3f6f.filesusr.com/ugd/cbe7f7_3f1f3bce8fa64f4bbcbdc46b4cc1f2d1.pdf?index=trueIn PDF document text
    • https://16fd3b15-5541-4454-9538-28daacbf497e.filesusr.com/ugd/e32576_d69bf14470b3473fa814c9d355908d2b.pdf?index=trueIn PDF document text
    • https://0c2a99dd-71fd-4a0d-b96f-672cfa785c21.filesusr.com/ugd/515c54_2ff37de2b02f4c5c9ff63ac690bcc763.pdf?index=trueIn PDF document text
    • https://83d12552-0bc1-4415-b221-1da25caacb9b.filesusr.com/ugd/1e11d0_3854495240bc46d6b73687e4a17bee34.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1841f96f-2363-4920-bdf0-74708aaa5950/panasonic_plasma_tv_wont_turn_on.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6482b42b-da4c-4ace-accd-bb79be5128b8/97775143618.pdfIn PDF document text
    • http://nelibusanexiput.epizy.com/nevavasegefekufovab.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_off00014222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14222 5272 bytes
SHA-256: 89fbe41aaa980cac732cdc33aed1c804917819c59f0a5efde2cc39c63425d9c1
font_01_sfnt_off000153ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153EC 11748 bytes
SHA-256: 061cae9d82b7f9226ded1ca7fdbadfadc93c2a1cdfc25ef6e351329ed6295f8d

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