Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a75f5e67a8a77ba…

MALICIOUS

PDF

83.9 KB Created: 2021-09-18 02:49:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: bd61fed649cc15ef61ed3e9f5a916510 SHA-1: 0cd166501c67c83f6b7f264eb26322df9de1b667 SHA-256: 6a75f5e67a8a77baac6572c7ba97232c45c6b585abe1bb94baf4cb042bb3f19e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pixomot.ru/uplcv?utm_term=how+to+hack+traffic+rider+mod+apk PDF link annotation
    • http://loscogliodifavignana.it/userfiles/files/40341627873.pdfIn PDF document text
    • https://uetty.xyz/js/ckfinder/userfiles/files/bavedidufuw.pdfIn PDF document text
    • https://christianbelieversmatrimony.com/web/christiansbelieversmatrimony/photos/ckeditor/files/gozoti.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/54fa817d4dfb76d175ae23c012455201/zuwemef.pdfIn PDF document text
    • https://maytinhdalat.vn/images/uploads/files/walediv.pdfIn PDF document text
    • https://markyatirim.com/resimler/files/26447943470.pdfIn PDF document text
    • https://postelezmasivu-zlin.cz/ckfinder/userfiles/files/30958062121.pdfIn PDF document text
    • http://tutaylamhet.com/storage/ckfinder/files/xupesagigusezo.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/9j32fnuhnnuph1uha8n44jc0e1/lijegebilenafexumotuluku.pdfIn PDF document text
    • https://eletroluz-al.com/_IMG/img_internas/file/fumafogegexuwiwa.pdfIn PDF document text
    • http://ropesadventure.com/d/files/venarojoxile.pdfIn PDF document text
    • http://xn----7sbev0bhje.xn--p1ai/images/news/file/sutigowade.pdfIn PDF document text
    • https://olivermilk.vn/tctt/sites/aaa/file/gejipenodum.pdfIn PDF document text
    • https://lawtutors.co.uk/js/ckfinder/userfiles/files/78206712203.pdfIn PDF document text
    • https://dichvuketoansg.com/luutru/files/todonoxemovefoxigev.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/48bc6e71c7f95838c15cfe31e29a2628/kibixura.pdfIn PDF document text
    • http://stringladies.cz/userfiles/39316276232.pdfIn PDF document text
    • http://terremeraude.com/userfiles/file/8209306342.pdfIn PDF document text
    • http://thaihotelsale.com/FileData/ckfinder/files/20210917_4A7A15A8B90E9D72.pdfIn PDF document text
    • https://cincia.ro/ckfinder/userfiles/files/63818845523.pdfIn PDF document text
    • https://www.thc.gda.pl/ckfinder/userfiles/files/fapil.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_off0000e417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE417 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2E 10736 bytes
SHA-256: 82e5596910ec0011a58ad8883512874fc1b56b096ceea8828d02167c2665096d
font_02_sfnt_off000114e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114E4 17336 bytes
SHA-256: 7017823d598572a0db9b9af77e001bec62f9032307fa028e02b606b2d1c8c9f8