Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc6a2023e517552b…

MALICIOUS

PDF

78.5 KB Created: 2021-06-28 08:54:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 57ac391b8107feff4557669abae6e80c SHA-1: c64baebb39d703fd167874d6d13fe48f862b512b SHA-256: fc6a2023e517552b7ee84dde9c0ef9043bc5156efa1a5ec272e8e73b9fc8a44c
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites, likely intended to host phishing content or further malware. The presence of numerous links on disposable or compromised hosting suggests a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/94002da4d496efb5c26ee1ebac016268/kaxizupuloledotenuzex.pdf
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c5b20190e2---demojinidadobexunujojoze.pdf
    • http://fullcolorspandoeken.nl/userfiles/file/1713989714.pdf
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/jkjo0u9an91lute5f1gqrab6bs/53045375313.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ffb5c669ee---92200731126.pdf
    • https://www.latentoac.com/portal/wp-content/plugins/super-forms/uploads/php/files/k352fn3hi44be90tphun952ce6/zigulofumagevuralevamo.pdf
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/91d95a9f893f652b952333c9c27c7a83/6208097302.pdf
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607007e97a56e---zuxodakexefawavodig.pdf
    • http://aiaato.com/FileData/ckfinder/files/20210621_631570480F720C71.pdf
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091733d6d721---rudowebijuvarewomatex.pdf
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/e09bea876b8228ca198c2471d5dbe10a/53291774155.pdf
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607727475fe30---75060550692.pdf
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/55ce34c92657a66b8ce7254cbe4741bb/12968016438.pdf
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1609091f987e59---bobifipusu.pdf
    • https://kermoulin.com/userfiles/file/manalivowafes.pdf
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16087ba745cd12---19947913217.pdf
    • http://ajtoablakcentrum.com/_user/file/nifavopegusariruna.pdf
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb20389844---36591328954.pdf
    • https://ltanimalpark.com/wp-content/plugins/super-forms/uploads/php/files/4ccc8e59a230d196c41a98b21f7b4c9d/petubadukegunij.pdf
    • http://occahomesearch.com/userfiles/files/76108625759.pdf
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607100805b3d1---70994106361.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac6d14dde55.pdf
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/b5af604327a518c8a2db6a0ae0c5b95a/mejirojawedurovukojavab.pdf
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160a024f6cb4fc---11873533637.pdf
    • http://galluccifaibano.com/userfiles/file/41442776367.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/2a3a8b7703e72fb3d9223ae0fec54287/40855305289.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=directions+home+please
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d052.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD052 16792 bytes
font_01_sfnt_off0000e869.bin
3d1bc3bd89dec3372d4b192961b4d63e12049295756c4433c8e0c73bebc2ff5f
pdf-font-stream PDF embedded font (sfnt) at offset 0xE869 10640 bytes
font_02_sfnt_off00010093.bin
7ae3b8a23b16ba3ef4170208bc7eeea08135aeecc87cdbc6db07d7be6573d39c
pdf-font-stream PDF embedded font (sfnt) at offset 0x10093 16944 bytes