Malicious PDF — malware analysis report

Static analysis result for SHA-256 9464298fd992a8c5…

MALICIOUS

PDF

101.5 KB Created: 2021-09-08 02:18:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f21822c981109f2872ff1fb31a647414 SHA-1: 7ffd567c287014c541fecadfc6a4ea5d0030c185 SHA-256: 9464298fd992a8c5773e3c8ba70084d46f1b53f2da919803fecd742e70086224
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of multiple external URIs and link farms indicates an attempt to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://laborke.ru/uplcv?utm_term=dwp+overpayments+manual PDF link annotation
    • https://cungcapthitdetuoi.com/app/webroot/files/images/pages/files/98892133648.pdfIn PDF document text
    • http://baggiez.net/userfiles/file/84212015666.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bca217a6954---josavimuluvagimurusoped.pdfIn PDF document text
    • http://dyglas.com/userData/board/file/33914599532.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/76b9618df0a07fce9d68b400a9b02b89/zinopenaw.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc03171fc44---legofozevevop.pdfIn PDF document text
    • http://jeyadhurgatemple.com/userfiles/file/zizafebeweverudile.pdfIn PDF document text
    • http://gaziogluenerji.com/images_upload/files/57866564553.pdfIn PDF document text
    • https://spotiverify.com/ci/userfiles/files/pemege.pdfIn PDF document text
    • http://scbczy.cn/up_files/file/20210620_222522.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/m13b8kga1qt9324gbl4kgtith1/18592818365.pdfIn PDF document text
    • http://chuaphucluong.com/uploads/image/files/witufosowesati.pdfIn PDF document text
    • http://vitaminyplus.eu/files/file/51050469276.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612926c26e0c0---67250860703.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b97b0dd8ffb---tizapifipisoponivezo.pdfIn PDF document text
    • http://mgtuae.com/uploads/file/dugelapuv.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092cfa9a51c9---6493169206.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612abe29aa95b---42566744140.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/161134a5be180f---titilotozizajajivodana.pdfIn PDF document text
    • http://mobilenmr.com/files/files/46038359219.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/17299475152.pdfIn PDF document text
    • https://ddshower.com/ckfinder/userfiles/files/6250288235.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_off0001273b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1273B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013f4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F4D 18896 bytes
SHA-256: 29c0d1c326582d0224355df30a478aed4b90b35918bc90405bdb9784fbaabf39
font_02_sfnt_off00016fcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FCB 10688 bytes
SHA-256: 97b4ad6b2ddf519695082292299dcfc3577f4c5f3e0a94c84911f2508532da8f

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