Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d30377200832b56…

MALICIOUS

PDF

75.4 KB Created: 2021-09-25 08:20:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e675da5118f9df0203b1b1ca68883030 SHA-1: 26941942d6a36f00a768cc5ccb9179be1457e3a3 SHA-256: 3d30377200832b56195dda861ca06696e5dd930068336547fe847d428e8a69d9
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable hosting and are structured as link farms, suggesting an attempt to redirect users to malicious sites. The document body is heavily obfuscated, preventing analysis of its specific content, but the overall structure and heuristic firings indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 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://garglob.ru/uplcv?utm_term=como+dar+conocimientos+enciclopedicos+a+su+bebe+glenn+doman PDF link annotation
    • http://efuegypt.org/userfiles/file/xodat.pdfIn PDF document text
    • http://holdemigny.fr/ckfinder/userfiles/files/67746800991.pdfIn PDF document text
    • http://www.thaiboat.net/image/upload/File/lavuwuvegotanege.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16140e61438d67---5457237495.pdfIn PDF document text
    • http://1111.morefriendship.com/upload/files/66621183235.pdfIn PDF document text
    • https://rosycaffe.com/file/88193989748.pdfIn PDF document text
    • https://gospel-streams.com/asset/ckfinder/userfiles/files/disujagixegobuxis.pdfIn PDF document text
    • http://exosportsante.fr/ckfinder/userfiles/files/gegapasaripajokavudon.pdfIn PDF document text
    • https://gadd-asso.org/userfiles/file/xodaxuniwa.pdfIn PDF document text
    • https://alpinebadmintonacademy.com/ckfinder/userfiles/files/32879912060.pdfIn PDF document text
    • http://servis-hradec.cz/files/file/23893596445.pdfIn PDF document text
    • http://konemara.hu/userfiles/file/foteril.pdfIn PDF document text
    • https://millvalley.com/wysiwygfiles/file/vukuxefiraw.pdfIn PDF document text
    • https://newshieldinsurance.com/demo/gsa/final/images/file/10797264127.pdfIn PDF document text
    • https://chulintemple.house-well.com/CKEdit/upload/files/fijajofaxikara.pdfIn PDF document text
    • http://vasekurzy.cz/userfiles/file/85446458571.pdfIn PDF document text
    • http://webcertain.net/contentupload/fckeditorUploads/organization_/file/gujabej.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/1614daccc9066c---gixozawobipupuzu.pdfIn PDF document text
    • http://myapartment.de/web/editor/files/jimowofazidamejulefapakok.pdfIn PDF document text
    • https://ariaparvaz.com/basefile/ariaparvazcom/files/12781456165.pdfIn PDF document text
    • http://conhantaoankhanh.com/webroot/img/files/74020786262.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://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_off0000bc1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC1A 18648 bytes
SHA-256: af71b823ce4394ba8b0bd7d62cd9d528321dbf89ef293cf7b959b3a748737b8e
font_01_sfnt_off0000ebe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000103f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F8 11128 bytes
SHA-256: 5684b336ece10a84bef4ca39f2038d256a415b8dc8603f73f5940aa06bacc868

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