Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fc455dea73ffab1…

MALICIOUS

PDF

93.3 KB Created: 2021-07-20 20:07:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f93ba32eafa1612e10e6f48e2cd6e488 SHA-1: 821faf68e7bf9439d22d2ec4adca7a24a44d0533 SHA-256: 2fc455dea73ffab110d60764f684018395e254376a4e61aebec83c5a21aed345
156 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, specifically flagged as Pdf.Phishing.Trojan. The PDF contains a link farm pointing to multiple compromised CMS upload directories, indicating an attempt to host malicious content or phishing pages. The presence of numerous distinct hosts and links suggests a broad distribution effort.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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
  • 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://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/90a77999f7f30fbef6c32ec1e97326c3/15896036010.pdf In PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/ggp7s0bnnjj8qshp4kr0sh0s01/88674568981.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160af97ee2ec8b---42894512859.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/voninalilapujagufozud.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1609e19b8a0cb0---51760935561.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16084453b0b115---14024628434.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/906e6c444c3506c03039f192c5550583/rezizanobeparisudepaxar.pdfIn PDF document text
    • https://room12shio4.com/contents//files/13911401634.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/16097778672ab4---gutuz.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d8ab27b3c4---96803412889.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075dab6a91c4---reteliraxexuwupor.pdfIn PDF document text
    • http://theettiares.com/clients/f/f0/f03dfc1790708d0b03c48e9879ef2ea6/File/lewimukagobusojuferixeb.pdfIn PDF document text
    • http://homespakistan.net/magzine/uploadfiles/file/bafinafuxodijuxoz.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/xiwej.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/84036623139.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609307d85de82---koruloj.pdfIn PDF document text
    • http://vaness-sens.fr/ckfinder/userfiles/files/tiwilolototewe.pdfIn PDF document text
    • http://rheinmotel.com/userfiles/file/bufenugisitofa.pdfIn PDF document text
    • http://farmstead.tw/farmstead/upload/files/tebiwaxosop.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/tsb3bd5ubtbjl3v8233db0gi77/2018576350.pdfIn PDF document text
    • http://mjsolankifoundation.com/fck/imagesfile/36238552576.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/160871908dc054---tosabagufulipipaku.pdfIn PDF document text
    • http://goddesshair.net/upload/users/files/sesusodej.pdfIn PDF document text
    • http://vinhhangvien.com/upload/files/74212723428.pdfIn PDF document text
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/02plmuoileqp9urpbdlb452ak5/nabisabulifevozorixaropi.pdfIn PDF document text
    • http://astro2sphere.com/admin/images/file/66793779040.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=realidades+2+capitulo+5b+crossword+answersPDF 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_off000107fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107FD 17328 bytes
SHA-256: 9e939d0631292fc97724e26595e6931e4a7da0a2509f3a7550aaaecfdc6e9584
font_01_sfnt_off0001356d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1356D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014d84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D84 11132 bytes
SHA-256: 7865718e3fef0f72aaf650701b3813b78ad09406412217c746b542288a09a877

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