Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dddf9bd4d6e97d2…

MALICIOUS

PDF

68.2 KB Created: 2021-09-27 08:20:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 985828c01b9188737273acfd3ffdba56 SHA-1: c9c5a9305493077a18a0cad8f2e15344881f1793 SHA-256: 9dddf9bd4d6e97d2910f72dba1eac21e43bac891cdc94838c5a2fdc8a430247c
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. The heuristic 'PDF_IMAGE_LURE' indicates it likely contains a full-page screenshot with a hidden clickable element. Multiple URLs are embedded, pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content or download further payloads. No scripts were extracted, but the overall structure and embedded URLs strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://inwebjor.ru/uplcv?utm_term=facebook+auto+reaction+apk+2021 PDF link annotation
    • https://www.luxboss.com/ckfinder/userfiles/files/gobaxejudubipibazez.pdfIn PDF document text
    • http://phunphu.com/userfiles/file/81689064998.pdfIn PDF document text
    • http://rockhouseschool.com/rockhouse/uploads/files/69946238370.pdfIn PDF document text
    • http://dfanchem.com/upload/files/pajokitu.pdfIn PDF document text
    • https://insinkerator.us/images/uploaded/file/judejenatugasolobujarirun.pdfIn PDF document text
    • http://truhlarstvi-strakonice.cz/files/file/76068142927.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1613e4b5fa2f4f---27770193617.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/b5fa884d1aaf772cf585a49239966bd0/80107721362.pdfIn PDF document text
    • http://whygzy.com/Media/Uploads/files/34633080945.pdfIn PDF document text
    • http://klwas.org/userfiles/images/file/16831885206.pdfIn PDF document text
    • http://capitaloffice.pl/fotki/file/xuvagowesepan.pdfIn PDF document text
    • http://melly-incendie.fr/img_db/47786808764.pdfIn PDF document text
    • http://work4shop.cz/userfiles/file/tugugenem.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16147d5aa89776---3197011810.pdfIn PDF document text
    • http://bebelino.ru/userfiles/file/sapabisegir.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ec48ab1536---momawenaliwuliribititi.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/21073573038.pdfIn PDF document text
    • http://risme.vn/files/bijadepetemon.pdfIn PDF document text
    • http://lsneotek.com/ckupload/files/vejoter.pdfIn PDF document text
    • http://mecateengenharia.com.br/ckfinder/userfiles/files/leradupasose.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613c0c23ab4ba---dezekiza.pdfIn PDF document text
    • http://kruengrangthai.com/files/files/12447698104.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_off0000ae84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE84 10756 bytes
SHA-256: eff4edf4e8098565b88b68d9188347c4bf31228bb8aa4c68748e65d61decb61a
font_01_sfnt_off0000c735.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC735 13916 bytes
SHA-256: 9057f9758fc3a75957827bd612db97ee071bb5c8b9f04065f57af14f6ee65b6e
font_02_sfnt_off0000e962.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE962 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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