Malicious PDF — malware analysis report

Static analysis result for SHA-256 395d1c7ad8e9c5b9…

MALICIOUS

PDF

95.9 KB Created: 2021-08-12 10:45:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 74c6165396515e24dee76a153e3f7a05 SHA-1: 8e9952539045e9aeb1cf60d2eec5f63e08fb521e SHA-256: 395d1c7ad8e9c5b9eeaa4d3078f40c5065f0cde69121f52b780a73831e949314
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution intent. It contains numerous external URIs and links to compromised WordPress upload storage, suggesting it functions as a link farm to direct users to malicious content. The document body is heavily obfuscated and unreadable, providing no further context on the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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=who+is+ohma+tokita+wife PDF link annotation
    • https://delaneyllc.com/ckfinder/userfiles/files/fajewizunomisapikaxipof.pdfIn PDF document text
    • http://elmbbq.com/uploads/files/wemasajekepit.pdfIn PDF document text
    • http://apcmagon.com/userfiles/ritedakope.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/7be97f2d8bd3033eed2bf2fe03fe6e42/tewupevosafuxas.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160af69faeeb0e---11008698326.pdfIn PDF document text
    • http://ancient-theater.gr/media/file/73307250037.pdfIn PDF document text
    • http://duoctruongxuan.vn/userfiles/image/file/87290169508.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/tijedotujitibekobo.pdfIn PDF document text
    • http://peusch.lu/userfiles/files/68437675131.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1609c87dd64438---jikasumaxejosagomafeluz.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160890f4b442b2---36722111791.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/185f512bd71ce1ddba3a35a0055fd9df/33614070790.pdfIn PDF document text
    • https://avenue102.com/uploads/file/gemexa.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609556e8babc9---putukusupesejoreruvem.pdfIn PDF document text
    • http://szakkepzosiklos.hu/upload/file/32756582971.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/d5ece92dd99e1bddab8de3b74fa3350e/finina.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160b24236d5eb3---gexufunuwelu.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/imv81mcermps6arlulasl89qdu/dejijumoropopi.pdfIn PDF document text
    • http://decom.pro/admin/ckfinder/userfiles/files/xunazadepobigu.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/hdjrh98n5ouf8r0h33debal301/josavomagive.pdfIn PDF document text
    • http://scmsalliance.com/clients/864514/File/bovabuwexavezisopabif.pdfIn PDF document text
    • http://startent.ru/SITE/files/editor/file/4631537531.pdfIn PDF document text
    • http://rockhousemethod.com/ckfinder/userfiles/files/50962686051.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/2bbca158aac8786752d1cefe434f3331/kumafoxegugosow.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160e660aa8e5a5---23346504615.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9F 10400 bytes
SHA-256: 1acd6c24cf7245f148119e9722abf6a3ba6389f789c0351a6c27c02cc4508b8c
font_01_sfnt_off00011646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11646 5368 bytes
SHA-256: 3fce9bbab73cddec3a13fb94b3a3e57292754b10bdc7f91e86919ee88e7db2fd
font_02_sfnt_off00012a4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A4A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001425c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1425C 18124 bytes
SHA-256: 111597abee6d93464d63d66c9dbaab5951daf570ea71aca0892200ae50ecfb48

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