Malicious PDF — malware analysis report

Static analysis result for SHA-256 90e8093ec02d2236…

MALICIOUS

PDF

71.8 KB Created: 2021-02-25 07:00:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 19d2bda502c103dc7aed38fa11afa16d SHA-1: c47c285abe2c5a2848e6c0bc8de4faddb9ed3179 SHA-256: 90e8093ec02d22361fe83254f780ff15e72c7cdb956ddefacb5a71fad796fb6d
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'maypoin.ru', which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://maypoin.ru/award?keyword=how+to+use+otg+usb+multifunction+card+reader+writer PDF link annotation
    • http://getveran.site/rafazilanurakutanofupq1ag.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461505/normal_5fe4b6ec60cc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407313/normal_5fd1793f4611b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382430/normal_601b8351290d0.pdfIn PDF document text
    • http://form-lnstagramcopyrightservice.com/how_much_spa_pool_costccfyn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365563/normal_602f21ff1e6cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488570/normal_60306c0d14b3b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469104/normal_5ff1b812c1c8e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rorives/45759340344.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/dodezadamib.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/87188846921.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/favaf.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/12336468681.pdfIn PDF document text
    • http://puligop.epizy.com/29_card_game_free_for_windows.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC677 5532 bytes
SHA-256: 9d2bd33a67c200c27ed0f13f6e1e42aa9fa239f6016f4360b549b9a93be9fb24
font_01_sfnt_off0000d943.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD943 10280 bytes
SHA-256: 75b5180815c698d4910e889897c0916c3ab0387ed9a93081089203d126747bd6
font_02_sfnt_off0000fca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA0 16164 bytes
SHA-256: ebd2804bff382343e08f6a42dc45f69f4e794c08b23908ae60ba78ededae74b1

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