Malicious PDF — malware analysis report

Static analysis result for SHA-256 931256065a74f967…

MALICIOUS

PDF

79.0 KB Created: 2021-04-02 02:22:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 6f3066b9c51a916fa0c9003b6ad301f9 SHA-1: 29707e8a06e5e4a9672e0b4d213af8f8e1317f89 SHA-256: 931256065a74f9670335dd71f86fa240942a0c7f507b6ca716ad936d130ed6c1
126 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, contains text related to 'injection stretch blow molding process', likely a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/award?keyword=injection+stretch+blow+molding+process+pdf PDF link annotation
    • https://gazumewus.weebly.com/uploads/1/3/4/9/134901575/xomibajukebalig.pdfIn PDF document text
    • http://lemakomude.sportsontheweb.net/kptcl_ae_syllabus_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456982/normal_5fd8ea7b7b471.pdfIn PDF document text
    • http://bamirajewenexo.medianewsonline.com/74862494592.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418786/normal_602e1ab2525e5.pdfIn PDF document text
    • https://gifefetetax.weebly.com/uploads/1/3/4/8/134899892/tuxuwadinokefex_kepumezez_tidupofememevuf.pdfIn PDF document text
    • https://rapusixub.weebly.com/uploads/1/3/4/6/134631860/699b2dff37bb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457881/normal_5feb0120d3e02.pdfIn PDF document text
    • http://rojoguladewex.iblogger.org/pavosukereturad.pdfIn PDF document text
    • http://jefevivavifax.scienceontheweb.net/asian_financial_crisis_1997_summary.pdfIn PDF document text
    • http://kopogaxepaku.sportsontheweb.net/23320045123.pdfIn PDF document text
    • http://kixiwogazu.sportsontheweb.net/45954541385.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446915/normal_603f61eedf399.pdfIn PDF document text
    • https://favoronul.weebly.com/uploads/1/3/4/4/134463409/9798488.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://tagugatukosag.epizy.com/statistical_modeling_by_wavelets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddbaec67-ac58-4ffd-9d49-cf9841fe5817/dogiwufuzepikoviwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c77fdf7b-7824-4f4e-a9b1-0b486e085743/niveles_de_prevencion_en_salud_definicion.pdfIn PDF document text
    • http://vidoniwofunevan.onlinewebshop.net/alphabet_tracing_workbook.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e89e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE89E 5392 bytes
SHA-256: 36bb0afda95db9f6a706e421f5d7bc8bd98c5df4641c0d7054626e35a493dd26
font_01_sfnt_off0000fad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD6 11084 bytes
SHA-256: 2b9186479ea978b94755ef71fbf952da251e48d977a990f51a69cdc36b22dc43
font_02_sfnt_off00012089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12089 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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