Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ce012279ec90351…

MALICIOUS

PDF

76.6 KB Created: 2021-06-11 23:37:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7236624325eae1931d994df094aa377e SHA-1: 5abab46d0eb7afd781a624eebe8059504fddbc79 SHA-256: 4ce012279ec90351356e23bd82aadf938dd8204b0f09c96f1372c64981a0bc88
156 Risk Score

Malware Insights

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

This PDF document contains numerous external links, many hosted on compromised WordPress sites, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, contains references to a 'Ford mustang shelby gt500 super snake' and 'wkhtmltopdf', indicating an attempt to disguise the malicious intent. The presence of multiple PDF-related heuristics, including a high ML score and ClamAV detection, confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://synerhu.ru/uplcv?utm_term=ford+mustang+shelby+gt500+super+snake PDF link annotation
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/bb35d322fdc0a553217102b5e33a0ea3/pipoxaji.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160801a9bc5ff3---28115268074.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa6e4d50fe---46041964359.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2814c9db0---loxagazowijobew.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/5b1c89a01ea08b1bb47290f229d8d72e/lamurezuwozavagipena.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/2c59fc76bd7df48163c29207bb23af68/92080883510.pdfIn PDF document text
    • https://asiquim.com/ckfinder/userfiles/files/zudaxidab.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/0dc7e6e9696439f125402a4389f0d93e/guronemaderex.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/ae7f7d7c9b7ca40a6491b88bdb10fb55/noterozo.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/b0326ef5817b9394f0fcfeae874c3a8b/fanifedojexabo.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160718ab80fab8---17382386806.pdfIn PDF document text
    • https://avigailpekelman.com/sites/default/files/file/48243191997.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/66763484468.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/modupesavezata.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc5c101b6b---16611076826.pdfIn PDF document text
    • https://oklasik.com/ckfinder/userfiles/files/bozujagofexuri.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://janyska.home.pl/_mjanyska2013/fotki/file/jevosowadi.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBE 5900 bytes
SHA-256: 6d459eeee8cf392e6ae075c7e463e6b3e24e358415a37a1dddf9970c88213d92
font_01_sfnt_off000100ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100AE 10624 bytes
SHA-256: 2047137faf49bed5c016a02957d713b267ad7fa0399cd7d0f724131e39f55e13