Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7c34256d152ab69…

MALICIOUS

PDF

82.3 KB Created: 2021-09-02 01:15:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7a7453f0cd6ae4cf117436ed6237b03f SHA-1: 93a70746182c22bb501d05a0ce234a1c1aaf4af5 SHA-256: e7c34256d152ab69372ca239e3eac0a6d002162a047869974b6f6b2d5f677a01
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites, suggesting it's designed to lead users to malicious content. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, indicating it's not intended for direct user reading but rather as a container for malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://crewmak.ru/uplcv?utm_term=causes+of+herpes+on+lips PDF link annotation
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/i3fr0g0186087ufg3f1ih5afl4/61319210574.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/620e66612134e02be2afcbbfd62d87e4/84628497187.pdfIn PDF document text
    • http://www.kingsmen-cmti.com/upload/files/73122176384.pdfIn PDF document text
    • https://bk.knu.ac.kr/ckfinder/userfiles/files/sexonivavowunanaginofeze.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a8dfdf0af52---41603252675.pdfIn PDF document text
    • https://rent-1.es/ckfinder/userfiles/files/486356442.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9b0dab0f71---91020816285.pdfIn PDF document text
    • https://ietc-oman.com/userfiles/files/81769798664.pdfIn PDF document text
    • https://noddy.nu/images/file/sakira.pdfIn PDF document text
    • http://easyreturn.store/userfiles/file/33625547346.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0398f446cc---74627994745.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/24d5bf1b878dc733f9b02498776d89c2/80086354087.pdfIn PDF document text
    • https://riolospettacoli.it/filesUploads/file/36779790516.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cda04281007---3307933850.pdfIn PDF document text
    • http://dlzj.net/upload/files/20210801231239578344.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/81d8d07cad1649d4ad7127fe82196a39/71133999002.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160822151a45c6---16706555627.pdfIn PDF document text
    • https://netiko.fr/img/Data/file/25530692443.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160983ccb17491---sujalupavipatugoloxe.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/3c9511a570829642571abe29ced0c267/pufebiwumoma.pdfIn PDF document text
    • https://www.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160737f85ad912---meguzodufuwerapafewi.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071789f950de---44089771418.pdfIn PDF document text
    • http://osteriailgalloelinnamorata.com/userfiles/files/35787557025.pdfIn PDF document text
    • http://rokakisreunion.com/clients/a/a8/a85ca1e4cfc2bb88d767af442173b437/File/peditonezozivokibeb.pdfIn PDF document text
    • http://border-inn.com/CKEdit/upload/files/xirodigebi.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de1c5edd823---24912576321.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_off0000df4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF4C 10488 bytes
SHA-256: 7c1515b90a5d89725deb1b23c0963b129148583cfbc5ad63a10f706622dca71a
font_01_sfnt_off0000f70b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF70B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010f1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F1D 18012 bytes
SHA-256: b18960398fbb7b61c8f4591ef0087d30651227fffd772f43606e6a18277efa19

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