Malicious PDF — malware analysis report

Static analysis result for SHA-256 89f26d138e43289a…

MALICIOUS

PDF

76.8 KB Created: 2021-08-11 05:18:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: cbbf0b05e8314dc8404b2fa82022c506 SHA-1: 269bf32468853511f53a37f3f3dc866ba3693b7e SHA-256: 89f26d138e43289a6d20ecd1b4a75e59ca0e175befc1ca3eeb8cdeedceab1983
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous links, many pointing to compromised WordPress upload directories and disposable hosting, suggesting it functions as a link farm to distribute further malicious content. The presence of a 'download button' heuristic further supports the attack pattern of luring users to download a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://www.hon-ro.hu/userfiles/files/febuwoni.pdf In PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/jkb0l3pctfv6a6lrba3id74kj2/dotawefuwarugixesagadako.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/1e544b1c1ab4be9d41b169e41fc442f2/59684307271.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b617c659a2---35423251642.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a842afa826b---79643197044.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8dd99385d---nozidejuwimugiluxatozope.pdfIn PDF document text
    • http://bodemveenweiden.nl/bodem-veenweiden-img/wefumema.pdfIn PDF document text
    • https://graveyards-fuj.ae/userfiles/files/75231598175.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/17487456111.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/6421c858a5b07b6fd7cd6c41cdaa36a1/21431894318.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098934a3de6a---levesalirepimenuzen.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/cf6e3d02c5be2cff4e7028006d7e593b/pinin.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a32ae993ce0---53917755933.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/quee9rcfdvmi8q4kdi83erut6s/basezodopiduliwogoxale.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073a7729ffc7---92935063366.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cff1b3beab---91186865605.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bb5e8011bde---68363559909.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/a5c6b49c1c16e5aa7e15ee566785766a/juwurapa.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/mh8mj800oem39r0lsom48poh6m/tepodalirofiduvazujisuto.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160accb409497f---16377008966.pdfIn PDF document text
    • http://liyangah.com/Upload/file/fotuzigixu.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb7ba60401---22735764880.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0123990e66---79392270554.pdfIn PDF document text
    • http://strap.sk/uploads/files/fetaviwirezabuf.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/mifjfsr53f6mg3lblo0mlbong7/73228786714.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=miya+bhai+song+download+mp3+pagalworldPDF link annotation
    • 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_off0000c692.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC692 11112 bytes
SHA-256: 59018d207e9e652ab763904081c7cbe3cf4f53e1689a06c89c5f10f932272e3a
font_01_sfnt_off0000dfeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFEB 17464 bytes
SHA-256: c87cec579047946c8ad8230067d075cd5d0e44927295cc2b00767494cfacfa81
font_02_sfnt_off00010dbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DBE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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