Malicious PDF — malware analysis report

Static analysis result for SHA-256 333ed6f46c098d6d…

MALICIOUS

PDF

76.2 KB Created: 2021-06-30 00:26:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e085eeea35beb31275d485753d5016aa SHA-1: a2b7d96a4eff9dec2bf21ee3640270b08e2d0bac SHA-256: 333ed6f46c098d6d1dc5e73bf1f407a1f51829ecd7c6e3e098258fd437ccf93e
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent. The file's structure suggests it's designed to lure users into clicking links that likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://marcuspietrek.de/MARCUS/files/file/mifeguxabikafowokutidites.pdf
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609626cf9759b---wafukikuje.pdf
    • http://hydrem.ru/images/file/31746086633.pdf
    • http://aldara-latinoamerica.com/userfiles/file/79412889894.pdf
    • https://ystechpro.com/nbloom/fckuploads/file/dawakipo.pdf
    • https://bititechnika.com/uploads/file/21668086975.pdf
    • http://pietroquatriniarchitetto.eu/userfiles/files/41433148689.pdf
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160be74ba01831---reboperudumidavixuton.pdf
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/vuetgap9p0gkg76uls1ifdemn1/49865253882.pdf
    • http://bagumul.com/file_upload/spaw_upload/file/20210511202007.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16086ad698fd6c---zemebifumipazuwegukusobal.pdf
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608966dc62ffb---riwumiruzufivuvibosokiga.pdf
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608689b042101---zamodudimumagevotize.pdf
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/4bd0e4bf831912a2084dc800984c9d77/wikatexitubilugajagupu.pdf
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/453f1ac76b04b1b741287a605a035e39/81565530034.pdf
    • https://akrmedia.no/ckfinder/userfiles/files/bajukekagimiko.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b2f4623561---4385261475.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/c6c22a45c9c719ec0b501377286255f2/61928788498.pdf
    • http://baigeleather.com/userfiles/file/xinigebajerapubofotadoxet.pdf
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/afcc9acdd95d9d29859975b11a6f721b/81142996833.pdf
    • https://sportsht.com/userfiles/file/lugugudesuzofeniguxovi.pdf
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/16076024a110a8---37814363415.pdf
    • https://panificioilcavaliere.it/userfiles/files/83315726268.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=stochastic+finance+an+introduction+in+discrete+time+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7a9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC7A9 16792 bytes
font_01_sfnt_off0000dfc0.bin
554d083b950ad14dcafe0c85b459b252fafd4873abc363b22dfef83f05d83863
pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC0 11016 bytes
font_02_sfnt_off0000f922.bin
548f5c67ce25bb3bbc1fae0974c7c66e395730bc2742219e7bff5091b41e061f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF922 16208 bytes