Malicious PDF — malware analysis report

Static analysis result for SHA-256 9004307bd7026c71…

MALICIOUS

PDF

78.8 KB Created: 2021-04-02 08:50:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: c9b50f874b6d15a8ea4519a23f5e3547 SHA-1: 9a797400e9a64a390668859b2ed50aa6c28fe318 SHA-256: 9004307bd7026c71139788ad0636231424c3590b1050950c26f9e9a918a2b8c6
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links that redirect to known malicious domains, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The presence of numerous links on disposable hosting further suggests a phishing or malware distribution attempt. No scripts were extracted, but the embedded links are the primary attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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 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.
  • 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://dafemum.ru/award?keyword=ata+chapter+5+pdf In PDF document text
    • https://cdn.sqhk.co/fazituku/i4Q4zge/dexitowutipulodaxodumabe.pdfIn PDF document text
    • http://mishabelle.ru/latest_christian_songs_2019gqe3m.pdfIn PDF document text
    • http://nipokaxa.getenjoyment.net/zatiropet.pdfIn PDF document text
    • http://moxupasasitote.mywebcommunity.org/candida_diet_plan_menu.pdfIn PDF document text
    • https://pojekemo.weebly.com/uploads/1/3/4/4/134469054/341812bef9c7893.pdfIn PDF document text
    • https://tifalexax.weebly.com/uploads/1/3/4/4/134471923/9743994324.pdfIn PDF document text
    • http://kakolamilasaru.medianewsonline.com/marketing_planning_process.pdfIn PDF document text
    • http://gexopidikimo.mygamesonline.org/jofis.pdfIn PDF document text
    • http://chambrehub.xyz/fonurefozepenazifemut92de.pdfIn PDF document text
    • http://mamubisuk.mypressonline.com/fimolikevidowabiserep.pdfIn PDF document text
    • http://nowukusox.mypressonline.com/61631018484.pdfIn PDF document text
    • https://lexabefi.weebly.com/uploads/1/3/1/3/131384613/3997858.pdfIn PDF document text
    • https://cdn.sqhk.co/dibirolinu/elffigc/27189695107.pdfIn PDF document text
    • https://cdn.sqhk.co/fefavezevir/vghghgg/pekodemuw.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzewekafan/h3hcYij/54203601042.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xakagigoneliv.myartsonline.com/19236280147.pdfIn PDF document text
    • http://koduwutuvage.onlinewebshop.net/architectural_design.pdfIn PDF document text
    • http://beliraguw.onlinewebshop.net/post_thyroidectomy_complications.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/57167851003.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/adobe_scan_doc_scanner_to.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/what_snack_pairs_well_with_red_wine.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f60f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF60F 5148 bytes
SHA-256: 222d27a5da4366a7f1e34c44ae0985ca5cb82aa852a533837051346093bead12
font_01_sfnt_off00010794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10794 11312 bytes
SHA-256: 369d4ea878b4ab3744956373c20438fb71fac9792b645cc2649b78416f87a61c

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