Malicious PDF — malware analysis report

Static analysis result for SHA-256 432f5c6ccd8fd7bb…

MALICIOUS

PDF

79.7 KB Created: 2021-06-26 03:25:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 90fc02bfc80061730381bf8b036ab5c4 SHA-1: c6263f187305c1c8fd9703bfbd1d7823472b998b SHA-256: 432f5c6ccd8fd7bbce3e82c5fd09e92dc8930e5a3534affd0c79028f76ad73f8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many of which appear to be hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=bharat+biotech+share+name+in+bse PDF link annotation
    • https://uniqrelation.com/userfiles/file/mexitufodi.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160700c02baba1---50281657156.pdfIn PDF document text
    • http://sovaimm.it/userfiles/files/57296054891.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/f8a0818ef61d8587e3c5544f84c2ff67/solilidudanubilogaxa.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607556dabe105---perawilalumetupozon.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0a8eba23e6---tawavodikatizubadiw.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160971f357cb78---rodigiruv.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/d8ad3f0c021b13f53743c618ad1f81d7/43097807061.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1609b2dd13257a---nomezukodofexowixu.pdfIn PDF document text
    • http://hasici-pristroje-eshop.cz/files/file/48611844240.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608a025e45e1f---66298279727.pdfIn PDF document text
    • https://jodhpurtravels.com/nbloom/fckuploads/file/povuwa.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/zilikiliw.pdfIn PDF document text
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/16086d1d515a68---sodibigipadamugonadi.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/49cb46216263a86fe79b6f870e0ef8af/22395532137.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609d2ec8ec396---zifasinevewofeweru.pdfIn PDF document text
    • http://zwickerfoto.hu/_user/file/jojarafujami.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/40204b958ae87ba16b12952daecbca7f/savisate.pdfIn PDF document text
    • https://proxus.nl/file/10579100150.pdfIn PDF document text
    • https://www.ideaklinikizmir.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072f8c53b01a---19927076041.pdfIn PDF document text
    • https://htddienstverlening.nl/userfiles/file/50229011771.pdfIn PDF document text
    • http://easternhoteljeju.com/FileData/ckfinder/files/20210619_A466C7459F502847.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/70118649137.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/a3f81d6be38853d2b8457acb89925694/5763489380.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/ea690bbd85d2bdc5a617f0a226716b5a/veramelawezuxajezanopij.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/24195917802.pdfIn PDF document text
    • http://tai-yang.tw/taiyang/upload/file/foxukakadubasum.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_off0000d164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD164 10640 bytes
SHA-256: 09c01cee16540ff25626bf6d047203ebe241e75021e4521e83bcbc06e40cc34b
font_01_sfnt_off0000e99e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE99E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000101b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B0 17864 bytes
SHA-256: d93eaabaec2aea665c3f819545df891d0dd6e689ee5d3619bb3b4944a5dca263

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