Malicious PDF — malware analysis report

Static analysis result for SHA-256 a64467d80680d7f0…

MALICIOUS

PDF

86.4 KB Created: 2021-09-05 12:53:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 584ac97ab5bf93cace2ee161d4c5fa6a SHA-1: c28a15fed936cfdd4049fb7a88d53bc848a80302 SHA-256: a64467d80680d7f0246569d68fe46ccc2fc31065acb61326600e1041de0fa9d0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to numerous external URLs, many of which host further PDFs or are hosted on compromised WordPress sites. This pattern suggests a phishing or malware distribution campaign, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://laborke.ru/uplcv?utm_term=quella+carezza+della+sera+spartito+pianoforte+pdf PDF link annotation
    • http://www.umadai.com/ckfinder/userfiles/files/15324753222.pdfIn PDF document text
    • http://kimhoatra.vn/upload/fckimagesfile/99671937656.pdfIn PDF document text
    • https://baigiangtoanhoc.com/upload/files/gonebixe.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/16125d4dca00ba---17364266286.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a16dbf7241c---9466766901.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/hgm7g4llfvk74gjhhjfdpl7n0b/minobikokisekijeronit.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c5b35dd5d---tosulagudekipuxelobikori.pdfIn PDF document text
    • https://trouver-une-ssii.com/img/pics/files/20113571600.pdfIn PDF document text
    • http://driscollandgibson.com/images/edit_images/file/dibunigakil.pdfIn PDF document text
    • https://gangwontaxi.com/FileData/ckfinder/files/20210814_7005B781E991E6FF.pdfIn PDF document text
    • http://markfarolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/82453343629.pdfIn PDF document text
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/dca350976760a835d387807b23d40c70/55785763480.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/d63029289c7fe4b96b61407718f163be/53150090171.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/pga64njsanuehrlbhm492jdnk6/duvorisumutazolemuz.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083431b78adb---zibadinarosesud.pdfIn PDF document text
    • http://avsa.org/sites/default/files/images/files/debodisexibebalinarubibef.pdfIn PDF document text
    • https://investincarpathians.eu/app/webroot/media/files/95157226297.pdfIn PDF document text
    • http://myboydfamily.com/clients/7/7f/7f513a2250c12de81a70a6735749c289/File/31307985317.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/3c2g6n755lg6t99jgpclqqqvt0/vivevujabo.pdfIn PDF document text
    • http://msinternationalbeautypageant.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/23365947732.pdfIn PDF document text
    • http://macautemple.com/userfiles/file/72871839342.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16098afb33d52c---temubofudotaxetimepekag.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/7513136988.pdfIn PDF document text
    • http://kpghomerepairs.com/uploads/image/files/funononisijugipivo.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_off0000e980.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE980 18444 bytes
SHA-256: 020781c957877027ecd1b56184e72ebe0b8525c7490f0071c9a2f400b37a0970
font_01_sfnt_off000119f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001320b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1320B 10832 bytes
SHA-256: 3db3e71f00f85e39fb119527a6624a9431fbc975e7015497885226b3ebbe0105

Open this report in the interactive analyzer, or submit your own file for analysis.