Malicious PDF — malware analysis report

Static analysis result for SHA-256 f204d5d3e3c149ff…

MALICIOUS

PDF

87.4 KB Created: 2021-03-14 16:32:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 832326c01d8bb7330eaa944ea866d838 SHA-1: 9d6dd7c2a10bd0ad8dd085f076f7742a2a9b0302 SHA-256: f204d5d3e3c149ff4c3a8ce4876aa39ab574b927ec0c371c37f4159bb6f6130a
264 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many pointing to disposable domains and SEO link farms, indicating a malicious intent to redirect users to potentially harmful websites. The presence of a link to a known malicious redirector further supports this assessment. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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/wix?keyword=pokemon+go+tutu+app+apk In PDF document text
    • https://cdn.sqhk.co/wekaradukuve/IgczdZf/fozunozedikisitejifineket.pdfIn PDF document text
    • https://cdn.sqhk.co/rorexamuviz/herPi9V/top_funny_sound_effects_app.pdfIn PDF document text
    • https://cdn.sqhk.co/xafigozenusu/BhcDihw/babifopug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461497/normal_603295140d250.pdfIn PDF document text
    • http://vuvulusigi.scienceontheweb.net/xoruvixise.pdfIn PDF document text
    • http://xutefizil.getenjoyment.net/apostila_aprender_ingles_sozinho.pdfIn PDF document text
    • http://pozijuza.scienceontheweb.net/9923994159.pdfIn PDF document text
    • http://nizavevorupuj.mywebcommunity.org/best_oil_for_honda_eu2200i_generator.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454971/normal_60150d3140222.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8c56b32b-3398-45d6-9c0b-b55146621f16.filesusr.com/ugd/6924eb_bfd0d31fb1d64bac9710e9ae987d3806.pdf?index=trueIn PDF document text
    • http://sutexuvidag.myartsonline.com/96624142036.pdfIn PDF document text
    • http://todiwefexoneb.atwebpages.com/cfa_level_1_book_4_free_download.pdfIn PDF document text
    • https://6e678f60-abc6-404c-883a-cd1729fdffee.filesusr.com/ugd/e4291f_f16a016c1f334a478d4ad3723a6a7c28.pdf?index=trueIn PDF document text
    • https://b9a4c3d6-4ccf-4d04-9b0f-c2e9c357e15d.filesusr.com/ugd/e5cbe5_8531769b759940e6a4cb2f0cf8c84f10.pdf?index=trueIn PDF document text
    • https://34886cf3-15ed-44db-93e8-8979dc7c4cd7.filesusr.com/ugd/ea2c45_dda209825ae64239bb606976ed1becf2.pdf?index=trueIn PDF document text
    • https://55d63786-14d6-44de-84d0-33f1fb383c44.filesusr.com/ugd/45fd81_5ee9deadf56c42ae85be250bf799eca1.pdf?index=trueIn PDF document text
    • https://95fbbc11-640f-4658-acdf-6e09da746871.filesusr.com/ugd/e42ee3_2c3ef8626e2e442bada4f411ebedf796.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_off00011932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11932 4896 bytes
SHA-256: 386b556e1f21393d0ea21c1998c38c0f19b909cff2b0d9274a940601fd7708a9
font_01_sfnt_off000129d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129D8 11052 bytes
SHA-256: 66315dc8deca389ae24c50bb7374bf4e76a677b2fb843bd905530a14719b2159

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