Malicious PDF — malware analysis report

Static analysis result for SHA-256 d64a9bf2c4711b04…

MALICIOUS

PDF

90.8 KB Created: 2021-08-09 21:09:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: 0883e01b0c3c442faabb26779a2b7e61 SHA-1: af8d3e434ba3e1abd36f9c451a67eaea3ebcb451 SHA-256: d64a9bf2c4711b04ce9e013fe29f21cf61fd54147e58f1defaa81991d48d3063
164 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The file contains numerous links, many pointing to compromised WordPress sites, which likely serve as a link farm to redirect users to malicious content or downloads. The presence of a 'download' button lure further supports the phishing and malware distribution objective.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1606f09feedfb7---49899452428.pdf In PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/b88bbfa5743363414f382b5fddc3f021/bolomitug.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160783dfb5da1f---2639373771.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/jufesikowaparuti.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/qfu16ne407ucpc9qlmngmm2lj4/22079660918.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/d0674243c387e959aa0031a3d2c6a1d9/14465786792.pdfIn PDF document text
    • http://paradisetourkorea.com/FileData/ckfinder/files/20210608_520DDFEEF42226AC.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/t3dc2o9b27ua28uh8fgjd8m8kc/fumebetowumoti.pdfIn PDF document text
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/mstplq4l32db68r7cr2gpnjgc2/38893991285.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d71005d6f3d---48500238101.pdfIn PDF document text
    • http://jan-fotografie.nl/upload/files/97291309095.pdfIn PDF document text
    • https://echipamente-scule.ro/userfiles/file/55991637281.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/5c95512cdfa09ed816f95339ff8fdaa8/kanowixufivemoz.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16088827a28343---tedujigajewuwafibajaz.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160997b6c5617c---xuniwipisibifujifolopapez.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/mkvcbvoc92em6nl1jdoaauba9r/65986214096.pdfIn PDF document text
    • http://stitesattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pevokabazonalolenetu.pdfIn PDF document text
    • https://kovtec.pl/eurostyl/photos/file/busigavif.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/0n2ve12b27efkjaa65konael87/diwanelijexosafapeta.pdfIn PDF document text
    • https://eobliecky.sk/userfiles/file/ledotavigunipuxajabira.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088a7a444899---sunok.pdfIn PDF document text
    • http://movitecnic.com/ressource/site-image/files/3639625641.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=chemistry+investigatory+project+topics+for+class+12+polymersPDF 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_off0000fa5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA5C 17692 bytes
SHA-256: b562c8603462a81e6e48e1d6372416845c82a0588364b72c81432f301efa906d
font_01_sfnt_off000128ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14104 11440 bytes
SHA-256: 51ec08508b6d519025d50ee3837d3164b463ae413deef92962d0cf89df18e25c

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