Malicious PDF — malware analysis report

Static analysis result for SHA-256 43de599b00bbefc8…

MALICIOUS

PDF

75.6 KB Created: 2021-06-11 05:08:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 18ba6dfda2c0f0d5fe63d79fe1ea761e SHA-1: 32e737320301a0833e3a5cd8cb5af1fc69c6b16e SHA-256: 43de599b00bbefc87660b3ef5aff6d05e0fc01793ac16407e6008b4459aab829
156 Risk Score

Malware Insights

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

This PDF file is classified as malicious by ML and ClamAV, and exhibits characteristics of a link farm. It contains numerous URLs pointing to compromised WordPress upload directories and disposable hosting, suggesting an attempt to distribute malicious content or phish users under the guise of providing downloads for game mods. The presence of external URIs and the overall structure indicate a phishing or malware distribution attempt.

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://crewmak.ru/uplcv?utm_term=dragon+ball+z+tenkaichi+tag+team+mod+iso+download PDF link annotation
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/e693d00773dae7c042bd8aebd9bacb76/diwedisarop.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/aaqeh4n4buuptgv5uln2qcfoe4/7379099901.pdfIn PDF document text
    • https://www.elitelawnsolutions.co.uk/wp-content/plugins/super-forms/uploads/php/files/meoqn093fv0lbg21j2t9k40sd0/76166256932.pdfIn PDF document text
    • https://zionapostolicministries.org/uploads/file/bugovuwararudivumevizaf.pdfIn PDF document text
    • https://108pizza.pl/uploads/userfiles/files/xixogifidalegud.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16098b0c741ddd---66836612320.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/32015480356.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084db0d88c92---zusexibuxofumekixebiw.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d972c4265---6576213327.pdfIn PDF document text
    • http://magendans.com/imagefiles/file/61421216616.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160840c3c43399---76751595625.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b857e012754---41811035362.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/ga73u12hv16499rnfdtbhe37r4/mobididagidinutoxirun.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/wofatibefilotozipo.pdfIn PDF document text
    • https://q-web.ro/wp-content/plugins/super-forms/uploads/php/files/0ed78o3jmk7p0fc260ge0t3sl1/18473173094.pdfIn PDF document text
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/eec1cb35366ae678d0bbccd229ca6f8b/xokujazelarazajikonuk.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606c916fad816---zawalajoduxegekabalagul.pdfIn PDF document text
    • http://scheidenschiedam.nl/uploads//file/pebejezorasowamezuv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE804 5696 bytes
SHA-256: 773ce89caa8131a72fab0d9918510df5918ec8505b8c3d5c6cc1a8166d78ca5c
font_01_sfnt_off0000fb57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB57 10896 bytes
SHA-256: 466533eaf71ecb8ea6b6b4a3d8a9533144646b99d167de9295f8e14cc0c6e629