Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f8e7d0375e833c5…

MALICIOUS

PDF

93.7 KB Created: 2021-06-27 22:43:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2551f996be2fdb9844dba91fe920ed5c SHA-1: 43054bc082d4dd913d7bd69904982facb00546a9 SHA-256: 2f8e7d0375e833c579c6131d5125c7672aa967db149c9a72619b5df3f1a43a0a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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://cructi.ru/uplcv?utm_term=animal+crossing+ppsspp
    • http://alexandraharris.com/clients/36054/File/11495853212.pdf
    • http://m2mus.ca/clients/b/b1/b1ca46fdb12d68e762e4a8b3318caec0/File/pivajoli.pdf
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a18068978c7---dufalexepawexelatixen.pdf
    • http://busankid.com/webfiles/board/file///41627167382.pdf
    • http://norilskgu.ru/userfiles/file/98101226555.pdf
    • http://vijyaiprismcrm.com/userfiles/files/18934865500.pdf
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aec9fba04a3---71430012080.pdf
    • http://sahrugs.com/userfiles/file/64406401028.pdf
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/fbf6e8ce37031816bb5b891a1101c367/65772304627.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160828ed409bf1---mowutivi.pdf
    • http://dragonera.cn/admin/userfiles/file/gogudowajaniwuweji.pdf
    • http://learningkey.org/userfiles/renaso.pdf
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606f31529e623---72985986161.pdf
    • https://presstone.hu/userfiles/file/72429554655.pdf
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bd17a53633d---74447208748.pdf
    • https://iword.de/userfiles/file/26807327159.pdf
    • https://powermailer.in/userfiles/file/21939855604.pdf
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/c70e96abfb09226bce1dad105fd9dd29/loxefamisimaza.pdf
    • http://ingmontagna.com/userfiles/files/webozuxudemigibara.pdf
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d67f14a337---vuner.pdf
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/1ebadb21dc57c0415fec452e0644eb3a/vamitududinitoketevape.pdf
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a01693ab0db---93674530080.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608cacacdfb7b---37068368197.pdf
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/a8llq5pg5or2u0lrf7ojih5374/69187799988.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbb6.bin
6c9f03b8d0abc7186ebd495b4f2639e5a5d5d7e4c1b28364e8b66608ceaba6f8
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB6 18252 bytes
font_01_sfnt_off00012a7d.bin
e3edd9b649b4280ed6e668b3523ad8ed3062974c1fcbf91b158217a025996462
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A7D 3748 bytes
font_02_sfnt_off0001393d.bin
9a212ba519a875ea96c6f49e6d0e707607b3b4b88302b187d0349d64a4baba6d
pdf-font-stream PDF embedded font (sfnt) at offset 0x1393D 10468 bytes
font_03_sfnt_off000150f5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x150F5 16792 bytes