Malicious PDF — malware analysis report

Static analysis result for SHA-256 a70180cae6a9346e…

MALICIOUS

PDF

77.8 KB Created: 2021-09-08 03:06:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 41d52fcbc76fa3d79bca51cba8c027ec SHA-1: 2b2a0b6a1c21154b0df35942e6ff30a656afd693 SHA-256: a70180cae6a9346e95fe15b36785cdfd8700165cc20c3571839493a8857f1654
156 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other domains, likely intended to lure users into downloading further malicious content or visiting phishing pages. The PDF structure and the nature of the linked URLs strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://catamma.ru/uplcv?utm_term=zanotti+controller+manual+pdf PDF link annotation
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/p3odi5van7kat0jlojevme8v0t/24456404501.pdfIn PDF document text
    • http://abwlargo.com/uploads/files/29236987022.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/4279f40377fb76c4a5795af94ee1b685/59201343125.pdfIn PDF document text
    • https://zold-kommando.hu/files/4880822041.pdfIn PDF document text
    • http://reanda.com/jingkelun/userfiles/files/20210808174422.pdfIn PDF document text
    • http://p-itos.net/admin/userfile/image/file/63320257855.pdfIn PDF document text
    • http://sdds.be/userfiles/file/jutilopoxigap.pdfIn PDF document text
    • http://zulassungsdienst4you.de/bilder/file/92704117965.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/tateroxubune.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/54b4092b82971cd3ac33e6c6e308084e/59351050002.pdfIn PDF document text
    • http://smclassof57.org/clients/34860/File/59313308786.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/eeqdbkmj63oo929mtpt8vbvtf7/47410558989.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/hbru0b7cf53e3bhmmvchh5ga5c/mumilufizoletigurokin.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a53e7e2b49a---wotidosoxukisepomubob.pdfIn PDF document text
    • http://mishelik.ru/userfiles/file/43673467956.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba5c4326cfa---tasenudolinuvawi.pdfIn PDF document text
    • https://congchunghadong.com/uploads/files/nukimidonevorusezixiwudel.pdfIn PDF document text
    • https://pergamine.com/ckfinder/userfiles/files/zaxamosof.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/wenerirowuw.pdfIn PDF document text
    • http://verduciautodemolizioni.it/userfiles/file/50418278022.pdfIn PDF document text
    • http://tmkb.org.tr/ckfinder/userfiles/files/81224531071.pdfIn PDF document text
    • https://stollerco.com/testingsites/advantage_aviation/assets/media/file/89728606887.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8BA 18880 bytes
SHA-256: e1c459aa8c4160012d13ce985fac378b1c75d97980afc3198901e0cf910213be
font_01_sfnt_off0000f93c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF93C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11153 10676 bytes
SHA-256: 9fa3cfe7ff19ec9de062599a09de83096fc8c30d1b5f34724b6dcbf5f9558dbd

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