Malicious PDF — malware analysis report

Static analysis result for SHA-256 efe3d9cb36dd3e8e…

MALICIOUS

PDF

75.1 KB Created: 2021-03-25 01:06:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: dae56406fb5befb9f53bc10f64c1629d SHA-1: d22db9eb0be99edb95784dc56d66058d0124bb58 SHA-256: efe3d9cb36dd3e8e251e9211b3c31c874aadaf7e7e3d47768b5eb18115a12143
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many hosted on disposable domains, suggesting a link farm or phishing operation. The presence of the 'utm_term' parameter in one of the URLs points towards tracking for a phishing campaign, likely attempting to lure users to a malicious site for credential harvesting or further malware delivery.

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
  • 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://ponafet.ru/strik?utm_term=chronological+bible+order PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414849/normal_5fea2caf7575f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378641/normal_600d17dbd7c3e.pdfIn PDF document text
    • https://generixa.weebly.com/uploads/1/3/5/3/135350481/abeaeb60.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472775/normal_60015f481a0c2.pdfIn PDF document text
    • http://bioforce-co.site/safety_inspection_report_sample_docpbcfg.pdfIn PDF document text
    • http://zuluwana.iblogger.org/87053903448.pdfIn PDF document text
    • https://wulodegekejiwa.weebly.com/uploads/1/3/4/2/134266030/zaxudafesol.pdfIn PDF document text
    • http://sodaapp.pro/short_run_and_long_run_production_function_with_diagramseh7d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371005/normal_5fef650d64356.pdfIn PDF document text
    • https://rixafivi.weebly.com/uploads/1/3/1/3/131380000/ravixo.pdfIn PDF document text
    • http://profyhouse.ru/how_much_is_the_dyson_v7_at_costcom70eu.pdfIn PDF document text
    • https://geridaradekod.weebly.com/uploads/1/3/1/4/131437552/3620641.pdfIn PDF document text
    • http://productwood.ru/razeridkj5o.pdfIn PDF document text
    • http://aslixan.com/plt_legend_instructionsfuimy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383923/normal_603e956be8e9c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tajarajizuwoso.rf.gd/lg_wm3001hwa_not_draining.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01a91c69-23e1-46e3-878f-98e5fedbf7b4/55578459681.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a35213c-14db-4df9-a0fd-8ef79110b87c/vekerawidaworapusuxagarel.pdfIn PDF document text
    • http://tafejedukevum.rf.gd/drum_brake_assembly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29076ede-f8a5-4af9-b070-9498fcbc0ee1/network_security_engineer_jobs_in_bangalore.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_off0000eb41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB41 5068 bytes
SHA-256: 879995d560bfb0352264d01e0545c4971e39383397f3ac7a8df0646a6dd0aebb
font_01_sfnt_off0000fc6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6F 10248 bytes
SHA-256: 2a4f4f7f9d149bcb154fe7a0c0e53465c742738a5dde9f045d037eb1cba24dcc

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