Malicious PDF — malware analysis report

Static analysis result for SHA-256 af29721e8f1a768b…

MALICIOUS

PDF

77.5 KB Created: 2021-03-08 03:49:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: a8b68ba312b25f445afe63464478a06e SHA-1: 2ea1e0a2d09f4ce567a3079559db63d1eadc2248 SHA-256: af29721e8f1a768b49ad2e049b22e7e756ddcb4e4b0b38a6a4aa85755cec4914
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 finding for linking to known malicious redirector infrastructure. The embedded URLs suggest a phishing or malware distribution attempt, likely delivered as a spearphishing attachment. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dafemum.ru/wix?keyword=golden+dragon+priest+mask+skyrim In PDF document text
    • http://tezuzaxufasoxi.iblogger.org/nopipirokixipipesubibuva.pdfIn PDF document text
    • https://cdn.sqhk.co/vomisape/gfggjin/game_monopoly_bingo_offline.pdfIn PDF document text
    • http://zozegakipuvi.iblogger.org/critical_thinking_skills_assessment.pdfIn PDF document text
    • https://cdn.sqhk.co/lokuwanij/giDRia2/67656472166.pdfIn PDF document text
    • https://cdn.sqhk.co/jigavozef/jhhh6gc/64098159020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380223/normal_60000732d03ba.pdfIn PDF document text
    • https://cdn.sqhk.co/zasokolof/cghjigj/gedovefidulo.pdfIn PDF document text
    • https://cdn.sqhk.co/gepumenujeme/KaIGgjb/33808175978.pdfIn PDF document text
    • http://xuzevofut.22web.org/ccrc_application_form.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421330/normal_5ff2347d7f86c.pdfIn PDF document text
    • https://cdn.sqhk.co/fabozesemi/OifhdTv/jixafugazelemegefulakus.pdfIn PDF document text
    • http://tekufebuxu.iblogger.org/cancel_noaa_weather_app_android.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xejotapawadi.epizy.com/ewtn_divine_mercy_novena_pandemic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23933d3d-16fd-4039-8409-dff3724c9d12/how_many_companies_are_listed_in_nse_kenya.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d09bf229-90d8-419a-aaa1-556c74b3cb97/ridgeway_grandfather_clock_maintenance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c25d179-8b5b-439b-b739-38a1941bdf40/waberovugarimus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/310eb456-2dbf-43ce-b90b-d458bc2d6ca3/66227518269.pdfIn PDF document text
    • http://kokitivem.rf.gd/hurricane_barry_weather_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc1836ab-c02c-47a7-b9d5-90ff985945a2/88150315665.pdfIn PDF document text
    • http://senapofo.epizy.com/ascites_causes.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_off0000f38f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF38F 5476 bytes
SHA-256: a86d3d06f97515c432e0e879e7386328e529dc219178e30ca06af0040c9d01e7
font_01_sfnt_off00010623.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10623 10148 bytes
SHA-256: 269aff9e7692930241bb6cb8d3fc857c9eac4e0fe16b9b1244749a866b63b2a7

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