Malicious PDF — malware analysis report

Static analysis result for SHA-256 00865765d5df05c9…

MALICIOUS

PDF

81.7 KB Created: 2021-03-08 01:53:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 83ca590b23e2be84588a7c982e127d3d SHA-1: 3ab97e4eb3908a8f3a677fa80d68078511cb881a SHA-256: 00865765d5df05c9511825da259e3b2a3ecdc36aa4859ffce35e6a7f62358ca9
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs pointing to various domains, suggesting a link farm designed to distribute malicious content or conduct phishing. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/wix?keyword=witch+build+poe+3.6 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4490250/normal_5ff32ccf2a421.pdfIn PDF document text
    • https://pasirukeb.weebly.com/uploads/1/3/4/0/134017476/lejerifab_xonebevozufavi.pdfIn PDF document text
    • http://iciapp.xyz/huskee_lt4200_belt_looseu0tvo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472186/normal_6040dbecf0ad1.pdfIn PDF document text
    • http://mutujejeturuduf.medianewsonline.com/wunovisaxi.pdfIn PDF document text
    • http://vuroxinizona.scienceontheweb.net/arms_reach_cambria_co_sleeper_sheets.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484631/normal_5fe79b8acee39.pdfIn PDF document text
    • http://about-igsupport.com/287145718478e970.pdfIn PDF document text
    • https://lagomumudalo.weebly.com/uploads/1/3/2/6/132681699/8b2ae.pdfIn PDF document text
    • http://fanisore.sportsontheweb.net/12370840471.pdfIn PDF document text
    • https://tilawifi.weebly.com/uploads/1/3/4/4/134480999/62d3ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463538/normal_601209f999171.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425237/normal_602f0e5c1caca.pdfIn PDF document text
    • http://fukerijinexin.mygamesonline.org/tafofap.pdfIn PDF document text
    • http://jekeluxuto.mywebcommunity.org/7_ps_of_marketing_and_their_meaning.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://rotufixijisadi.onlinewebshop.net/selections_from_the_complete_works_of_swami_vivekananda.pdfIn PDF document text
    • http://xuvekixofeku.onlinewebshop.net/18757702084.pdfIn PDF document text
    • http://nabulegewuwal.myartsonline.com/skipping_rope_training_program.pdfIn PDF document text
    • http://siwemoxoxawevuv.atwebpages.com/fonadinedutigidegijapez.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_off0000e9a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A7 4956 bytes
SHA-256: c6802c9583dba921fee36ca264c0bf2c4b81267278381800828ebb2681768546
font_01_sfnt_off0000fa95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA95 16068 bytes
SHA-256: 4762e1b2d37485e67b2399659840a150955d8007433494621af0f5167aac8f3c
font_02_sfnt_off00012ba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BA0 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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