Malicious PDF — malware analysis report

Static analysis result for SHA-256 07c62a345f45dc8c…

MALICIOUS

PDF

73.4 KB Created: 2021-03-10 19:38:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 11956942074de451d48b31b067afe0fd SHA-1: f045121e577487fadeb50d04cc68e5ad0496a5d9 SHA-256: 07c62a345f45dc8ca5216d896f98913262d18ee681e111fc1f9d9e2324d0e48f
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/wix?keyword=kendo+guide+nito PDF link annotation
    • http://xedekozis.22web.org/ecg_test_report.pdfIn PDF document text
    • http://raxejudesezix.scienceontheweb.net/28523178264.pdfIn PDF document text
    • http://wajadadajevebab.22web.org/folenubujak.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xovolefewawex.atwebpages.com/true_devotion_to_mary_st_louis_de_montfort_you_tube.pdfIn PDF document text
    • https://ad0d0dbb-669b-46a9-85df-79487014a0f3.filesusr.com/ugd/00d95d_447499aaa4be444b9d07575126ef9892.pdf?index=trueIn PDF document text
    • https://042e50b4-45d0-4577-915a-c14d43ab21ad.filesusr.com/ugd/18f527_15d8329da705411cb9219b759390eb2c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/languidez_estomacal_wikipedia.pdfIn PDF document text
    • http://waxodomopupu.epizy.com/3893484684.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/54400743485.pdfIn PDF document text
    • https://54a0e2cb-796f-4f80-9aaf-d11633176b06.filesusr.com/ugd/b0c554_85679ab11f614a02a4dc137089f115b5.pdf?index=trueIn PDF document text
    • http://jatoxat.atwebpages.com/finding_angles_in_triangles_worksheet_answers.pdfIn PDF document text
    • https://c2093f15-f4fb-4bda-9582-db5404103fa6.filesusr.com/ugd/b28561_fc3834131c3649dc8314d0108d884421.pdf?index=trueIn PDF document text
    • https://b860438a-ced3-4995-86f2-ad9a24e3f15c.filesusr.com/ugd/938eb2_b01e18aad2bd4e66aa61e208ec47029b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/doruxirepipone.pdfIn PDF document text
    • https://6739ca04-605d-4ff4-b4c9-4e5bd75a7819.filesusr.com/ugd/031dda_aa612fbcf1474f57aeb98d7e0375f844.pdf?index=trueIn PDF document text
    • https://a8a2d6b8-6248-42a0-90a4-e25e421c2e59.filesusr.com/ugd/f63f29_94b4410d3c2d4ba6bdc3b4015e619ac0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/toniseligiwuzux/crystal_reports_viewer_backwards_compatibility.pdfIn PDF document text
    • https://37e0f79d-b0c1-4727-b76d-5b759c81288f.filesusr.com/ugd/9c66ff_b3c1f5934b0d4acdad2329e127bf4488.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_off0000e6ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6AE 4448 bytes
SHA-256: 0dde3d8ad63c7ee1ff2a5b20dce034d15acebf136e1393dc8a9fdf5f41e934bc
font_01_sfnt_off0000f5ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5ED 10236 bytes
SHA-256: 750c778dbdf82cb07bc8719b30e2cfa63f07b1490d81414bb05acd092cb5a058

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