Malicious PDF — malware analysis report

Static analysis result for SHA-256 734cd9a0a3821dbc…

MALICIOUS

PDF

76.2 KB Created: 2021-03-25 02:12:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 0b083b4ff0735280110a464704432274 SHA-1: e3bce75e16a6215270e22cca09813642cfc5c8da SHA-256: 734cd9a0a3821dbc11f4b4620f71818129c3fea21bf8767bc1562fb6d74b9b53
184 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier. It contains embedded links that redirect to known malicious infrastructure, indicating a phishing or scam attempt. The PDF structure itself is also noted as a link farm on disposable hosting, further supporting its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://crophysi.ru/award?keyword=avision+ad240+pdf In PDF document text
    • http://modalidetefid.iblogger.org/honda_gx620_parts_list.pdfIn PDF document text
    • http://noxivivixuza.22web.org/ziwemulowivemekakize.pdfIn PDF document text
    • http://reduslim-sito.site/taluwubuwolakerixosikopepuba8j.pdfIn PDF document text
    • http://meetsucre.pro/69173244503uppey.pdfIn PDF document text
    • http://itverys.space/samsung_front_loader_washer_error_code_4esutlf.pdfIn PDF document text
    • http://navaram.online/87993233971mi6qs.pdfIn PDF document text
    • http://tublitalia.space/sample_motivation_letter_for_master_degree_in_marketing24g32.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/04ca371e-b08b-4f93-9b02-0b13d2a76571/whos_afraid_of_virginia_woolf_george_character_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b51e459-4abe-45cd-aa32-2967b2860446/41445977182.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f715e1f7-2da0-44fe-b967-311085e3ba91/77602851463.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/30586084754.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d103d9ae-c210-471d-9ae9-d00adeacf734/zoxalaritokotadijiju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ea6eff7-63db-46a9-94df-c5d80e461247/27691659959.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cce82a51-99c0-4f9a-aa98-fe992090c52f/how_are_simple_covalent_bonds_structured.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2462211-178c-437b-8e92-46ec7dc7a095/2008_jeep_wrangler_rubicon_oil_change.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b3cf8d5-0eec-44a1-b439-541872d8fc77/tinamo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6204ef52-3ff6-40d3-8fe9-3b25bd680720/86674233154.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54cce049-061e-4354-a88a-084abd9cf91f/xikarapam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d863209-ed53-4866-a896-6a1fd56d1dcd/12840299146.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/82750895404.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/reflexive_pronouns_worksheet_doc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec87575e-cf81-45b8-936f-598d79cc2504/kemonuxeloniramazaduxosag.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_off0000eae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE9 5316 bytes
SHA-256: 7b9a9393e43de8afdddbf566a9d2b891922195d6f37b71469d77e59866a8ade0
font_01_sfnt_off0000fd26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD26 11368 bytes
SHA-256: 76caf68d766782608a69df0f5636766a6b746b66ff889a1284264d1164cd8204