Malicious PDF — malware analysis report

Static analysis result for SHA-256 08007e44755a9b41…

MALICIOUS

PDF

92.1 KB Created: 2021-09-18 03:52:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f70906b66995bc974268c53538fc4bc8 SHA-1: 0fcdc6f9c377cb2fbd90bc4c52cd3c1e4e7a3aff SHA-256: 08007e44755a9b41af7fa7db19218ae8f4af919a5be578589d4042c312bf082a
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a network of redirecting links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://medvor.ru/uplcv?utm_term=how+to+use+android+system+webview PDF link annotation
    • http://smalternatywa.pl/media/upload/files/c3a0bc8f45943248148c17ea626390a9.pdfIn PDF document text
    • http://gediklimakinahidrolik.com/resimler/files/popuvofenebo.pdfIn PDF document text
    • http://jinyezi.cn/upload/7296854724.pdfIn PDF document text
    • https://delta-relay.be/userfiles/file/71219223718.pdfIn PDF document text
    • http://ubestsports.com/imager/files/20210910121832.pdfIn PDF document text
    • http://diamantina-joaillerie.com/ckfinder/userfiles/files/21828935515.pdfIn PDF document text
    • https://datajournonepal.org/files/tekaxifixato.pdfIn PDF document text
    • http://vibrator4you.cz/UserFiles/File/jatugugolenalejosivesu.pdfIn PDF document text
    • http://kiddeefire.com/media/userfiles/files/80902907574.pdfIn PDF document text
    • http://schokofontaenen.de/idata/84237153597.pdfIn PDF document text
    • http://sgd42.ru/userfiles/file/53590296705.pdfIn PDF document text
    • http://www.css-jp.com/upfile/files/2021/09/02/nezutekopasigenagunofi.pdfIn PDF document text
    • http://levakov132.ru/userfiles/file/daxafuwofekezamatoxexozo.pdfIn PDF document text
    • http://elitaliaweb.it/upload/file/bisodedinigemupigobibikus.pdfIn PDF document text
    • http://greenmodels.ru/uploads/files/85662473838.pdfIn PDF document text
    • https://lixtech.com.tw/ckfinder/ckfiles/files/lutebotewediwovakudogepi.pdfIn PDF document text
    • https://cosanuesa.com/componentes/editor/ckfinder/userfiles/files/winuxafoserot.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/21282280968.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613d85a150a1b---62820797868.pdfIn PDF document text
    • http://potentialdesign.cn/userfiles/file/1630853421.pdfIn PDF document text
    • http://sarigol.kr/userData/ebizro_board/file/wuwidadulogur.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_off000102d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011ae5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE5 18000 bytes
SHA-256: e82fc98d285ad0ffe51bdec4995dd30f6cc5c4faf045b861793d10a1f887b13f
font_02_sfnt_off000149a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149A1 10860 bytes
SHA-256: 600165d844205c236d0f6425f5f896e2fa5650d7104f5703796dd44b7b56877b

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