Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d84b5127e8bdc09…

MALICIOUS

PDF

97.3 KB Created: 2021-03-16 11:02:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 28034559aaef2ecd8c0cb62bbba51dbb SHA-1: 14b5e5d3a1018ca57e6cf72b496777339712d1ec SHA-256: 3d84b5127e8bdc09d031d414d26e4494c10a8d53cc5f4145bca69ea96afbafcd
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, indicative of a link farm for SEO manipulation. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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=one+piece+dub+schedule PDF link annotation
    • http://nasporte1.fun/misak1k10y.pdfIn PDF document text
    • https://cdn.sqhk.co/ratufewebu/iVifibp/wowatovuwemitodekapupubu.pdfIn PDF document text
    • https://medadafamu.weebly.com/uploads/1/3/0/7/130775854/b1d45c494.pdfIn PDF document text
    • https://cdn.sqhk.co/sisowufabo/jbyXgcD/crowd_control_warehouse_canada.pdfIn PDF document text
    • https://gunagabivap.weebly.com/uploads/1/3/4/8/134863042/1204144.pdfIn PDF document text
    • https://dikemogegopur.weebly.com/uploads/1/3/1/4/131406608/lorusu.pdfIn PDF document text
    • https://cdn.sqhk.co/gitovera/egeijiL/31464775287.pdfIn PDF document text
    • http://evromotors.net/99140966968086w1.pdfIn PDF document text
    • https://cdn.sqhk.co/lizuloka/Vighjij/59988860559.pdfIn PDF document text
    • https://naduxirakolanin.weebly.com/uploads/1/3/5/3/135304083/1077812.pdfIn PDF document text
    • http://musc-media.xyz/lennox_ml180_owners_manual43eyr.pdfIn PDF document text
    • http://women-ita.space/at_cafe_6_sub_indo_720p7hhoe.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/13334c56-4455-4a14-a725-fbe1cb4a078a/does_samsung_a10_have_good_camera.pdfIn PDF document text
    • https://bc260b4e-efc2-469d-9102-9c7234992d76.filesusr.com/ugd/b1b3ad_8d30a5b3ca2742c6b4e01c49363c6b50.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b921f9d-7b6c-442b-a7ff-0e9ac221ec53/38253088489.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a04d07e-2480-4a5e-84de-c62cd32fd6cb/85695194158.pdfIn PDF document text
    • https://917ed8d3-8a9f-4c5c-a3ad-554e533308ad.filesusr.com/ugd/a4e402_663e1105cb8948278d19d8c2993e32c7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/77150400-431e-43c1-991f-b8bccc3b9bb2/how_the_bible_has_changed_over_the_past_2000_years.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01b6f84c-160a-4f8e-a194-5f01bde2b22c/vopebixor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a25adc17-06a0-40f1-b965-ec0623fccac4/50733774710.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19e29b26-e7b0-4ff5-af35-80b5255d1cb4/lojeduremuvafe.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000118ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118CE 5020 bytes
SHA-256: 09b7fb0c6e104d7f88ad606cd5776819b2a3fa3c0006b3737aeb6f8f4fbd2582
font_01_sfnt_off000129d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129D0 3284 bytes
SHA-256: bed4bc8fc5d436c4bb95a33b901db8de0d19c75f124903e0fdc95cb9205898f2
font_02_sfnt_off00013719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13719 11652 bytes
SHA-256: 96d1c6a88cc2cd266c3983675bd743b80c92657ef3119bdec98711e3790d2db6
font_03_sfnt_off00015ef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EF6 17040 bytes
SHA-256: c271a622fa7d905989cb86171d7af4667c50b2e78bf3ecbecb50079b3e4f0173

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