Malicious PDF — malware analysis report

Static analysis result for SHA-256 99e8215d4d81fb4f…

MALICIOUS

PDF

83.2 KB Created: 2021-09-05 14:46:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: dd3c54747de3cf63d849065a42e41c9f SHA-1: 738b320d99e46e9f12cb8e29d654b6205f42565a SHA-256: 99e8215d4d81fb4fce02c580252939b0b17532569486fe2ba3799e3485b713a3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a link farm pointing to numerous PDFs hosted on compromised and disposable domains, suggesting a phishing or malware distribution campaign. No scripts were extracted, but the presence of numerous external URIs indicates a redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://bodzlomu.com/userfiles/file/xoxatofivebogiwolelop.pdf In PDF document text
    • https://promptcorporate.com/ckeditor/ckfinder/userfiles/files/vasozulogoxa.pdfIn PDF document text
    • http://ekachaiguitarist.com/ckfinder/userfiles/files/jovijefubimaxolarifewujak.pdfIn PDF document text
    • https://www.bramfordgc.co.uk/ckfinder/userfiles/files/63485714025.pdfIn PDF document text
    • http://thebankcardservice.com/uploads/files/xupozaju.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/5e76611a3d0ecb84be69c6d826872e49/rufupipevu.pdfIn PDF document text
    • http://highendschmiede.de/highendfiles/file/najeguzajizupolomo.pdfIn PDF document text
    • http://pastadimatteo.com/ckfinder/userfiles/files/74896586905.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/51543dfd6339046305c6dfe0c1fa962b/97675134150.pdfIn PDF document text
    • https://deltagroup.bg/uploads/file/jumobokefinef.pdfIn PDF document text
    • http://densayhongngoai.com/uploads/userfiles/file/pipabafebewifagar.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/32644050699.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbbdb777b11---5708885718.pdfIn PDF document text
    • http://hilltop1976.com/clients/24685/File/rafaxanuraluvepoka.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/16124246dd7428---68887766131.pdfIn PDF document text
    • http://studio-rivetti.it/userfiles/files/navupesa.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/80308249995.pdfIn PDF document text
    • http://nebovsem.ru/app/webroot/files/files/sakagixodut.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a45ec9df189---tujisudunelulo.pdfIn PDF document text
    • http://cuspsurgeons.com/userfiles/file/83210100360.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/20416144559.pdfIn PDF document text
    • http://bienbao.net/uploads/files/xujiboxerodizi.pdfIn PDF document text
    • http://maychamsocda.vn/images/userfiles/file/wekozuwudogibomubonu.pdfIn PDF document text
    • https://filetorme.com/upload/files/48415158969.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/65c14b3b3440fa13ea27636aaffb77c5/nezunafan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=geronimo+stilton+books+pdf+freePDF link annotation
    • 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_off0000dfc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC2 10768 bytes
SHA-256: 791bbe79340e9d5ecb9012339c1b54e98cde1be01965783d03a55a03fb6c78b1
font_01_sfnt_off0000f84b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF84B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001105d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1105D 17712 bytes
SHA-256: 59908829177162f5580b4ce02fe508737ce9f59832367ae001d6d536de689a6e

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