Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c5e1f494c479079…

MALICIOUS

PDF

84.4 KB Created: 2021-03-08 08:48:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 09803ee963e4024ac65ac9d006d91f70 SHA-1: 0d360712443e9d04e7832fa0a73132810e67fcd5 SHA-256: 5c5e1f494c479079bb34703df62a85eff281ac757b2fc06f07b66c1f6e91219b
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The embedded URLs and the document's structure point towards an attempt to redirect users to malicious sites, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://baarspo.ru/award?keyword=percy+jackson+and+the+lightning+thief+book+review PDF link annotation
    • https://cdn.sqhk.co/viwiratoposu/qhcPigo/wurosudimofefi.pdfIn PDF document text
    • https://xutesinazered.weebly.com/uploads/1/3/4/5/134529246/biwukew_gekeso_daxejotigojig_fopagizujemumi.pdfIn PDF document text
    • https://cdn.sqhk.co/sofizagumup/SdOhiih/56543709937.pdfIn PDF document text
    • https://cdn.sqhk.co/nikamegamu/jgdjghg/ludo_star_hack_coins_online_2017.pdfIn PDF document text
    • https://cdn.sqhk.co/nomazotesi/3zjccWk/97274485361.pdfIn PDF document text
    • https://cdn.sqhk.co/demanajinu/GhmidqT/kung_fu_zero_2020_movies.pdfIn PDF document text
    • https://lawatekuvux.weebly.com/uploads/1/3/4/2/134265731/4327809.pdfIn PDF document text
    • https://zaloposigino.weebly.com/uploads/1/3/0/7/130739621/8862058.pdfIn PDF document text
    • https://lelorovosa.weebly.com/uploads/1/3/1/0/131071021/ac3d1.pdfIn PDF document text
    • https://cdn.sqhk.co/juxezijafoz/jfjcahi/rofiruxasavukijajudu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387817/normal_6001a74cd89d7.pdfIn PDF document text
    • https://tujiniwiko.weebly.com/uploads/1/3/5/3/135350236/34cd09c38716d04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388272/normal_5fe68823e7c1d.pdfIn PDF document text
    • https://cdn.sqhk.co/legikowe/jdGagjt/zasorokinobibuv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409118/normal_5ffe7204bb715.pdfIn PDF document text
    • https://cdn.sqhk.co/zimalodepafo/ijkicge/7265924441.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://93bb5028-8b17-4c47-8ab9-f46a024b0e86.filesusr.com/ugd/041612_f27cb6af40c84da8b4f6e20764174daf.pdf?index=trueIn PDF document text
    • https://6afed14e-2b01-442b-8c2e-11a8a6f39965.filesusr.com/ugd/46a5ae_feb3d79f4c894e73a7dfc5f8cde67a3d.pdf?index=trueIn PDF document text
    • https://56db2a4d-09ce-4ff6-a558-abb1d6727cd4.filesusr.com/ugd/003b86_1c8adc6b816d487c985cbc7c5e853c7d.pdf?index=trueIn PDF document text
    • https://584abdf6-e408-48d3-a53c-4313a8f82471.filesusr.com/ugd/18ee90_d55c7ccc0de14128a0e3dab74bdb78b2.pdf?index=trueIn 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_off00010a9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A9B 5816 bytes
SHA-256: 7b584baa40a1e4bd777e7a25253f474224e9ac438b7fccf0e35f42bd73276a89
font_01_sfnt_off00011e87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E87 10884 bytes
SHA-256: e9dd08b7c3ad22cbb45ec74f4cd1b3606279fae5a5305c92f4eeca23432d1214