Malicious PDF — malware analysis report

Static analysis result for SHA-256 1db189be0ccb7965…

MALICIOUS

PDF

63.8 KB Created: 2021-01-21 14:57:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e433e53880301c5d1d7e8c273d1cbe26 SHA-1: d0041decfeefdbbcf15668417b9492ff6d1abed1 SHA-256: 1db189be0ccb7965f270f4968b850808942dbf34a26a74239610eace0ff95e71
184 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical alert for linking to known malicious redirector infrastructure. The embedded URLs, such as 'https://traffmen.ru/123?utm_term=h%2526m+heating+and+cooling+utah', indicate a phishing or malware distribution attempt. The file's structure and the presence of embedded URLs suggest it is designed to lure users to external, potentially harmful, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/123?utm_term=h%2526m+heating+and+cooling+utah In PDF document text
    • http://rimisirotox.iblogger.org/kafegopijawofu.pdfIn PDF document text
    • https://cdn.sqhk.co/zijikunu/d1MjeK5/truglo_bow_accessory_kit.pdfIn PDF document text
    • https://takojetomegupaj.weebly.com/uploads/1/3/1/3/131382497/457cb4345b2.pdfIn PDF document text
    • https://site-1175508.mozfiles.com/files/1175508/valabok.pdfIn PDF document text
    • https://degexaxi.weebly.com/uploads/1/3/1/4/131406510/pojasig.pdfIn PDF document text
    • https://site-1176370.mozfiles.com/files/1176370/underhand_dumbbell_row_muscles_worked.pdfIn PDF document text
    • https://lukogazusewof.weebly.com/uploads/1/3/4/6/134643336/2779694.pdfIn PDF document text
    • https://site-1172173.mozfiles.com/files/1172173/mironur.pdfIn PDF document text
    • https://site-1224402.mozfiles.com/files/1224402/cisco_umbrella_roaming_client.pdfIn PDF document text
    • https://jowopuvuramikir.weebly.com/uploads/1/3/5/3/135313070/safen.pdfIn PDF document text
    • https://site-1245421.mozfiles.com/files/1245421/79128017048.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nimunofat.epizy.com/open_office_spreadsheet_calculations.pdfIn PDF document text
    • http://zomimek.epizy.com/54262246245.pdfIn PDF document text
    • http://fabodatutowew.epizy.com/43991942092.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c0ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0CA 4116 bytes
SHA-256: b66b5c207ee1bb315b5e769424a51c8f369f9d65d8a72a051ed77a4c9521277b
font_01_sfnt_off0000ceca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCECA 10712 bytes
SHA-256: fe59e40488ace89aa47ecc0d1a109957588c771255edfa05191f2612a3f0cd98

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