Malicious PDF — malware analysis report

Static analysis result for SHA-256 034ea46338116d53…

MALICIOUS

PDF

80.2 KB Created: 2021-09-14 05:19:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0a23bf10fe8bba8bde3977d19259631d SHA-1: 357ca0f31a37374e0e7897b582cf281149f3ac9c SHA-256: 034ea46338116d53de6240b4a7745d53925915bd98ae16dc82b74ca50ef0d165
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many of which are hosted on disposable domains or compromised CMS uploads, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, potentially leveraging embedded JavaScript for obfuscation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://medvor.ru/uplcv?utm_term=mrna+codons+for+dna
    • http://newbiiz.com/upfiles/file/sugezidumesatedijerexax.pdf
    • http://pkynfe.net/userfiles/file/wogomevikusatowilusun.pdf
    • http://philipwillettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/boboj.pdf
    • https://jeevadhara.org/work/london/userfiles/file/mifejizotaragirabadimoguk.pdf
    • http://sportingfoundation.com/uploads/file/95237123291.pdf
    • https://lmcmanager.com/ckfinder/userfiles/files/53831690963.pdf
    • https://reniuved.it/file/81236426250.pdf
    • https://qualityroofinnandsuites.com/nbloom/fckuploads/file/kevumevazawikego.pdf
    • http://rem-stroymont.ru/img/file/naribepaw.pdf
    • http://jump360.co/upload/files/20210902152650.pdf
    • http://lingvastar.z-i-g-z-a-g.com/userfiles/files/46100852008.pdf
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/a7b25b7f4e046c80634eaa7c6db4d81c/vikejazapunokunatuwumip.pdf
    • http://www.petercar0937494634.com/upload/img/files/24287990107.pdf
    • http://stickers-moins-cher.com/userfiles/stickers-moins-cher.com/file/74209741868.pdf
    • https://kvzriu.org/images/file/lijebidi.pdf
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136818d4f336---wododalelalaro.pdf
    • http://floral-design-lindgens.de/userfiles/file/55939156069.pdf
    • http://shinies.ru/img/lib/file/nebefuvesabiweris.pdf
    • http://auto-rad.pl/userfiles/file/77043347144.pdf
    • http://vicc.huh.hu/UserFiles/File/vedipobatupe.pdf
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/16138e241124b0---wotafub.pdf
    • http://optimumnieruchomosci.pl/uploads/userfiles/files/27441915128.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_off0000d615.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD615 16792 bytes
font_01_sfnt_off0000ee2c.bin
f578c07508239f5afb565196746b5bcce3de8a5de2d5d61b9aeb70b6f540ad75		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2C 10092 bytes
font_02_sfnt_off000104c0.bin
a563d249d2c442ed8f5491699b5f51c8e0dba3c1251c64b8f2a2ff5461b54dee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104C0 17980 bytes

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