Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0dd9c44df0de5c9…

MALICIOUS

PDF

86.0 KB Created: 2021-07-06 03:47:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 70fc6b4cb96796d99fb3295ca1d01a62 SHA-1: cced3a4c3457dd22a9092f266de28cfff17b5114 SHA-256: a0dd9c44df0de5c9d5323ca77fc042515adbd8a82c8351f7fae27d4bd07d9a0a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs pointing to compromised WordPress sites and disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://drafthe.ru/uplcv?utm_term=the+power+of+one+thing+pdf PDF link annotation
    • http://recrute.fr/files/files/43395895494.pdfIn PDF document text
    • https://lasvegasrebath.com/wp-content/plugins/super-forms/uploads/php/files/6291c3957f24e25637e6fa6e5107b1a4/damasukejawafogadoluvax.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/1d3ad498f612ecdd84debb07f86a0652/gejanotapatipibumezixu.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/k3fai2tk36bqjkjqcmuhrfbmq0/merosixifivugapese.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608189d40832a---kewawimigonupunosud.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093dee50c4c9---98816718066.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1609e0382a2177---15717847756.pdfIn PDF document text
    • http://chinalanpa.com/images/upload/File/sinux.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/45d7bf79276af3b908090e800e8dfa19/jojalezemipinekuz.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0221455e2---34167813702.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160871af16307e---12985079995.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/68a82e5209d7f14c4307910abe2aa39e/rarulirojozaladixe.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/vfuukfvn5o6oqe868eovt7194k/24276083927.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ba5d127d7d1---25437518104.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/1d9e4ed8c4eb957e21e3c259b36d9cd0/foderusoluzelelo.pdfIn PDF document text
    • http://retco.ge/ckfinder/userfiles/files/vubunugavuzozuso.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16088729c534fd---buzirujite.pdfIn PDF document text
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/d0cec18c2b21220f735fe96f8cd92e3a/84477105582.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/c66c624626811ca8959f27f65afb262b/94854068272.pdfIn PDF document text
    • http://deepakbatteries.com/uploads/file/soxasufibukolivare.pdfIn PDF document text
    • https://adsbudget.net/userfiles/file/nononasakafitiwefu.pdfIn PDF document text
    • https://gachbinhduong.com/upload/file/4756168402.pdfIn PDF document text
    • https://carrieres-pierre.com/userfiles/file/xopigofezinut.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_off0000ebe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000103f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F7 17432 bytes
SHA-256: 8c392f6b3af3301f0556c0b3f13924b6ea6c703d29d2009ec6a306dda025bb7d
font_02_sfnt_off000131ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131AE 10448 bytes
SHA-256: d7e843be391d9c275950f516ba87c1ee991532aac45662af8d3731ffe4df055d

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