Malicious PDF — malware analysis report

Static analysis result for SHA-256 10d1b0e11b23f553…

MALICIOUS

PDF

83.1 KB Created: 2021-05-28 23:40:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: ebd074ce8d2dbbf92e8eb02c4efc2c9e SHA-1: e82606a3dafc223f1d88651a14060c6a9c4187b1 SHA-256: 10d1b0e11b23f553a5e4c4b964383a7dfb8ae7943969f2853dbcd5f0350d89f3
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified as a link farm, with the primary URL pointing to a site offering 'Adobe after effects cc 2018 plugins free download'. This suggests a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing unwanted software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • 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://lozipotod.ru/strik?utm_term=adobe+after+effects+cc+2018+plugins+free+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4466659/normal_5fe43442cad74.pdfIn PDF document text
    • https://putesoborufo.weebly.com/uploads/1/3/0/8/130814126/55581c6d55fd865.pdfIn PDF document text
    • https://mesakejaj.weebly.com/uploads/1/3/4/7/134754162/galizumow.pdfIn PDF document text
    • https://pirebuvix.weebly.com/uploads/1/3/2/7/132710697/6968017.pdfIn PDF document text
    • https://fujinimozebuxe.weebly.com/uploads/1/3/0/7/130738673/2413456.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416930/normal_5fec4faa4a06a.pdfIn PDF document text
    • https://vojosapixetogal.weebly.com/uploads/1/3/4/7/134770394/3811020.pdfIn PDF document text
    • https://ladifibefumuxuw.weebly.com/uploads/1/3/4/3/134353250/190769.pdfIn PDF document text
    • https://vapevaka.weebly.com/uploads/1/3/1/4/131407737/c79e96fe.pdfIn PDF document text
    • https://raxuvutozorar.weebly.com/uploads/1/3/7/5/137512290/gegupodegulijaporola.pdfIn PDF document text
    • https://zotepuzexalebox.weebly.com/uploads/1/3/5/3/135397030/e26384c6f1b.pdfIn PDF document text
    • https://vagonegasix.weebly.com/uploads/1/3/1/4/131482995/743a64d325715a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390374/normal_5fd7b6d236dd6.pdfIn PDF document text
    • https://varukixenusenat.weebly.com/uploads/1/3/4/7/134700479/dotipovovafoduvojep.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499023/normal_60083de6d0e90.pdfIn PDF document text
    • https://sosabugipos.weebly.com/uploads/1/3/4/6/134657522/8211096.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
    • https://uploads.strikinglycdn.com/files/99073d4d-ea81-4595-8962-973cfb0e3f29/19688670584.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b536bcd2-bbed-4d6d-8b7f-521a62a371c4/16338999478.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4002c019-ec03-491a-b381-28f12154a306/jekosokefebiwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70b21f87-375c-4439-82dd-cc2e27af25f9/metric_system_worksheets_4th_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ce53590-23ba-4ae8-b104-6a0e3e723220/ultimate_slimy_lab_kit_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b92e2e46-dbcf-4ea3-bee9-97436268c2c6/linde_h25d_forklift_parts_manual.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_off0000f3ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CE 5948 bytes
SHA-256: d8994f16887a3d7a2a40f1a6197c0a2c21fd65b014f78ac94d5d66cbc32bc466
font_01_sfnt_off00010826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10826 12040 bytes
SHA-256: f0b699912e77da679143c03b31be7edac672dac1d74076c7801d91cb787071b8
font_02_sfnt_off00013051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13051 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f