Malicious PDF — malware analysis report

Static analysis result for SHA-256 02d38146b00096eb…

MALICIOUS

PDF

74.4 KB Created: 2021-03-14 22:53:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b2b2991b19a391b3bd8dead51e3f369d SHA-1: e85c42f4f44d0ad430a22aa9cf2fed112cfbb0f7 SHA-256: 02d38146b00096ebeac34785b930207d64794a584364a78dce57e0c56574e8c4
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting a phishing or SEO poisoning attack. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing malware. While no scripts were explicitly extracted, the PDF structure and numerous URLs point towards malicious activity.

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/strik?utm_term=how+to+relieve+tight+psoas
    • http://jushq.club/xasaduwinovojuwuwavp0ee.pdf
    • https://ponatuxo.weebly.com/uploads/1/3/4/5/134596183/d050ccaadc0580.pdf
    • https://pepakulal.weebly.com/uploads/1/3/4/8/134885681/juxilonofekuk-bokajub-moziru.pdf
    • http://feremujidonigu.getenjoyment.net/add_2nd_edition_character_sheet_app.pdf
    • https://zuwodavipufowaf.weebly.com/uploads/1/3/1/4/131408056/1113428.pdf
    • http://frontglass.xyz/apdi_pode_mp3_songy8wul.pdf
    • http://kulokozataxat.22web.org/agilent_gc_7890b_datasheet.pdf
    • http://sokixatov.mywebcommunity.org/introductory_mathematical_analysis_for_business_economics.pdf
    • https://lefesime.weebly.com/uploads/1/3/4/8/134882546/zotifijuj.pdf
    • https://mogorabijeruli.weebly.com/uploads/1/3/1/3/131380728/fomil.pdf
    • http://gepokupaburorew.mywebcommunity.org/zunitutalam.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://a9864912-ad24-422b-99f3-2d90f7703507.filesusr.com/ugd/d6af85_17e56f0889ac4aefac497905ea447f28.pdf?index=true
    • http://gomugugagaf.onlinewebshop.net/80013191475.pdf
    • http://nabulegewuwal.myartsonline.com/excited_state_lifetime_measurements.pdf
    • http://vuzudaru.epizy.com/why_does_my_husband_hurt_me_physically.pdf
    • https://d09251a9-b09e-4077-8ccb-24037f005f7b.filesusr.com/ugd/a6ce17_c90b7bbeff9c4abc985ed96497e8c41c.pdf?index=true
    • https://0c2a99dd-71fd-4a0d-b96f-672cfa785c21.filesusr.com/ugd/515c54_84f080f134a34b1f9611776635771782.pdf?index=true
    • https://592908bf-dd96-48cc-88d9-ffebbdd10d84.filesusr.com/ugd/f34823_bf12e37a5ee44bc3b10ce22588c3c9d1.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e420.bin
ba8a9d2c00c3be5dbe0a773f74f0e1d74f6148dd9456327661bcb9747bd20378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE420 5192 bytes
font_01_sfnt_off0000f5dd.bin
260ca54013b1e527905dd5c094c49468ab23c6de1bd9bd6fba5b11e5e4564152		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5DD 10832 bytes

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