Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e46b287d11f64d3…

MALICIOUS

PDF

103.8 KB Created: 2021-03-18 18:54:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e9c3cf8c77c05ede1b4c670246c7f6d2 SHA-1: df2e61c8220f75a30be4bc496e370c086e868b6d SHA-256: 3e46b287d11f64d3f5e2196fd7bb183ad83774a6a72a9a2c2cd87ebabb63a6df
194 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, suggesting a link farm designed to host malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the PDF's structure and embedded links, particularly the one to 'soxebez.ru', are indicative of a phishing or malware distribution scheme.

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://soxebez.ru/wix?keyword=ionic+bonding+practice+worksheet+key PDF link annotation
    • http://dosijefa.mypressonline.com/tigejufirugujap.pdfIn PDF document text
    • https://zapoxafejomazex.weebly.com/uploads/1/3/4/7/134745353/nuperixiv.pdfIn PDF document text
    • https://tafebitekule.weebly.com/uploads/1/3/0/7/130776603/rozufopumurekil-lezodudum.pdfIn PDF document text
    • https://jelugofinetala.weebly.com/uploads/1/3/5/3/135389066/f2532360c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371014/normal_603f953faa61b.pdfIn PDF document text
    • https://dibasipelop.weebly.com/uploads/1/3/0/7/130738559/5923637.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489245/normal_60233c6496c8c.pdfIn PDF document text
    • http://puvepum.getenjoyment.net/business_report_presentation.pdfIn PDF document text
    • http://faxusigeroles.sportsontheweb.net/29555934507.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/88349ab7-5abc-4974-9a4a-87a2b02afd17/nubadamopebaripumoter.pdfIn PDF document text
    • https://850a36a1-966c-46c3-86ed-e15bcb5778a7.filesusr.com/ugd/ede58b_7459452155154b838ceaf2dafc989a16.pdf?index=trueIn PDF document text
    • https://86a9da1b-0b57-4b35-a77a-523886b904cd.filesusr.com/ugd/0d9a50_5cbf99b8a37e42cfb4426eb1329f360c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/00b94c21-fa02-4be3-bf86-837a0f9882d5/hoover_spin_scrub_50_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb1938d0-1138-4ad2-96ee-ad84c18200f7/7303512502.pdfIn PDF document text
    • http://jitawidavez.atwebpages.com/what_is_power_dissipation_in_cmos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/690a9618-15b9-453f-acb7-77f5208f318c/how_to_put_music_on_serato_dj_lite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc22ddfa-d245-4700-bf47-2070bbc49895/79907790063.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e05a124-65ea-4ce2-afdc-37d87f19dcfb/how_to_install_kenmore_oven_heating_element.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_off00014fa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FA5 2828 bytes
SHA-256: b7f317aa0f29cd34df008dc84d8f376d2685882a57a4a5cd0d86477d0adf885a
font_01_sfnt_off000159a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159A0 5640 bytes
SHA-256: d3f99aa71d61958cdaa81a56ba78d9ba1364fb09b2026d722499894727df1c0f
font_02_sfnt_off00016cda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16CDA 10272 bytes
SHA-256: 2695609c134c0580a574f6ac3f85ca976236495ab3184b095ed282797a76f8d9