Malicious PDF — malware analysis report

Static analysis result for SHA-256 b32b55fa816fb481…

MALICIOUS

PDF

83.3 KB Created: 2021-09-20 17:44:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 549289c5c28e0a0bd39299a2e98c69fe SHA-1: b046ce3e083726a897e8811140f281f6e8ab09c2 SHA-256: b32b55fa816fb48170563dde6c285c886e9b8872c04d481b6369132e707baed0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://chcial.ru/uplcv?utm_term=increase+ring+time+android
    • http://www.vinoplaza.nl/img/upload/files/sidazuwasimagadinez.pdf
    • http://drsuthichai.com/userfiles/files/dizunufove.pdf
    • http://speednewslive24.com/assets/ckfinder/core/connector/php/uploads/files/viwonipamedaj.pdf
    • http://bdsps.org/slbdavbatala/userfiles/file/lokavapifivalos.pdf
    • https://ksboutlet.com/file/files/fowujalaw.pdf
    • https://ukmalayalamnews.com/userfiles/file/9371595137.pdf
    • http://cafegreenwichvillage.com/uploads/files/munavav.pdf
    • https://hashtag.school/userfiles/file/65342283503.pdf
    • http://thaide.org/userfiles/file/56857091547.pdf
    • http://adbrf.com/files/fckeditor/file/1821193947613f2f8a39578.pdf
    • http://tieulongcopro.com/luutru/files/xuwukotoxo.pdf
    • https://heatingboiler.ca/fck_upload/file/96562995695.pdf
    • https://duragloss.pl/userfiles/file/vulamufebawowemimiwox.pdf
    • http://collegium-connect.nl/ckupload/files/60894635069.pdf
    • https://hkki.org/userfiles/files/ruxezorubazimizope.pdf
    • http://studiorumeo.it/userfiles/files/31748090217.pdf
    • http://lunaleo.pl/userfiles/file/tamipuzigiforiwubiwado.pdf
    • https://cristalensi.com/public/File/89181038392.pdf
    • http://attep.com/home/sandbox/domains/heekee.com.hk/public_html/ckfinder/userfiles/files/ketibokakubabiraduwufewa.pdf
    • http://polaryachts.com/res/wysiwyg/file/63674596562.pdf
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/bb69af4cd66c2579c6bf2d55a9a285e2/xisuzepazurujo.pdf
    • http://rydelko.pl/userfiles/file/junuvezu.pdf
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/b4bac9c3b0f69b582336fc4483a21931/81448781034.pdf
    • https://smwebtechnology.com/arishayurveda.com/userfiles/file/zenowixivarogowomewize.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_off0000dddb.bin
5c7d045b227f171bc023e004f831152d1f263bb143dc6146eb2aad6edb4235fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDB 10616 bytes
font_01_sfnt_off0000f5ec.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5EC 16792 bytes
font_02_sfnt_off00010dfe.bin
1e7d9b6c9b77110278fb8f107f1332db816a6f7298a56047a69b5a1c2f2006b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DFE 18792 bytes

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