Malicious PDF — malware analysis report

Static analysis result for SHA-256 809da10cedc8d039…

MALICIOUS

PDF

90.6 KB Created: 2021-06-28 06:32:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0d07cf852ca7a24a14d7ffe66612a891 SHA-1: 03a46fc0a641745a7c19fd18d2a41200f46c3794 SHA-256: 809da10cedc8d039d2e51cdf4a4e00e167087d33abe856c4ae3c1049195f0a3e
156 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs pointing to various websites, many of which are compromised CMS uploads or hosted on disposable domains. 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 URL patterns are consistent with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://betenenergy.com/sites/default/files/file/nisuvegetatorajonawizowe.pdf
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5a5d59ef38---10664131030.pdf
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16078ef6654562---nugerer.pdf
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/o5demc6jb6qv9un511mbs0na60/rojeje.pdf
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/078fb88a8ec31fab080fb0a4bdeecfe5/77701384921.pdf
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c90f0b5c5e---77404578348.pdf
    • http://xn--pr3b03lcdvwu9dpynqkc.com/DATA/file/20210614203714.pdf
    • http://afghansolar.com/userfiles/file/jatolemonekuxokozo.pdf
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608030f56ae3e---84753343312.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc8510cc0c---kiwafogefawubirakaxutubas.pdf
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160a17b1ccc0c2---vovusugerupoteb.pdf
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/b612a3c2569ad397f0602e413a8a3f53/49727133062.pdf
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c78546aea4---wumifumu.pdf
    • https://binarbaidtrading.com/public_html/userfiles/file/nibixujigozab.pdf
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/3c9678c1a1141f4d20118e88811f1285/kedasoboxume.pdf
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/9bf3c8bfa257821e0f4fad5da32457ac/12057200328.pdf
    • http://twxcd.com/img-aim/files/44315329753.pdf
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160706f968501a---fuzubevavu.pdf
    • http://akvatoria.by/UserFiles/files/96298029395.pdf
    • http://incucinaconalberta.com/userfiles/files/82034552250.pdf
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099d3904d6b5---larekugenilaweto.pdf
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160a926c98f5fe---10360859884.pdf
    • https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/0ee9586b9785f895c390d72fa89c9cce/31586831157.pdf
    • http://amghanoi.com/images/ckeditor/files/nanarefibuvobukejibo.pdf
    • http://michellesmithscott.com/clients/36670/File/679300836.pdf
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/ba7e8c2cd620485432a781fb5ee847cb/97414596142.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=meaning+of+ocean+acidification
    • 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_off0000ff92.bin
d0d8c22695b558846c36add298c898dc88c01f8a1b63a83c7116d0207d3f74dd
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF92 17872 bytes
font_01_sfnt_off00012dde.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DDE 16792 bytes
font_02_sfnt_off000145f5.bin
272c425f531885370b1bbf4cd43fc7466c28b3c69056e4b3cbdee0d9b8c07c56
pdf-font-stream PDF embedded font (sfnt) at offset 0x145F5 10328 bytes