Malicious PDF — malware analysis report

Static analysis result for SHA-256 129f2e702737fd7b…

MALICIOUS

PDF

67.7 KB Created: 2021-06-06 22:06:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 24bd9e34aec66f3a327efda3e7147625 SHA-1: c5059c9afd0d6a28a8801c8860073c34ffe78faa SHA-256: 129f2e702737fd7b8c99bddd5e4c74538fe6cc7b0a65cf48fac76cf3d2125d9f
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://jumiwimov.ru/123?utm_term=free+3+generation+family+tree+template PDF link annotation
    • https://guxanavos.weebly.com/uploads/1/3/4/2/134235011/d704369503.pdfIn PDF document text
    • https://tizidebiwefixim.weebly.com/uploads/1/3/0/7/130739379/1543054.pdfIn PDF document text
    • https://pajopujo.weebly.com/uploads/1/3/4/3/134305169/xubununu-latapape.pdfIn PDF document text
    • https://vufosaxirit.weebly.com/uploads/1/3/4/0/134018891/9881651.pdfIn PDF document text
    • https://warogowi.weebly.com/uploads/1/3/1/6/131606132/fb0761fa151.pdfIn PDF document text
    • https://tiguziriwisil.weebly.com/uploads/1/3/1/0/131071210/ziruwuwotop.pdfIn PDF document text
    • https://maxawoxemun.weebly.com/uploads/1/3/4/6/134615094/sutorajebir.pdfIn PDF document text
    • https://visumosibe.weebly.com/uploads/1/3/0/8/130814065/a36f2f8.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/3ec0b032-5959-4027-be07-6c957985b85a/can_exercise_cause_low_iron_levels.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4106e357-d084-43ec-b7e4-9bce63a169e5/5419608936.pdfIn PDF document text
    • http://xorunezagu.pbworks.com/f/monsta_x_variety_shows_2020.pdfIn PDF document text
    • http://kunozulig.pbworks.com/f/zosarelewajidefulaxizilox.pdfIn PDF document text
    • http://gozuwef.pbworks.com/f/bloons_tower_defence_4_hacked_arcadeprehacks.pdfIn PDF document text
    • http://lulimogosan.pbworks.com/w/file/fetch/144509913/wojixukigoku.pdfIn PDF document text
    • http://mefijunov.pbworks.com/f/bodozaxod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccbac3e1-107a-4bda-8d39-1f085cb4c429/why_is_my_roomba_900_not_charging.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa9f342b-c241-404b-b7a1-c5d317264dab/64815634730.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46d775fe-e31f-420e-b7b5-e8b7ae069e40/zadififitumikakawowinuvi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69714eee-4d82-4923-91d0-6078ad36e62b/what_is_the_best_budget_software.pdfIn PDF document text
    • http://negovijalulu.pbworks.com/w/file/fetch/144426072/hadoop_the_definitive_guide_github.pdfIn PDF document text
    • http://sekodegaxex.pbworks.com/f/libros_sobre_liderazgo_empresarial.pdfIn PDF document text
    • http://zalemofe.pbworks.com/w/file/fetch/144709992/vabedisuwadovifadatowesem.pdfIn PDF document text
    • http://pinurakus.pbworks.com/w/file/fetch/144723672/92377360963.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_off0000cc81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC81 5264 bytes
SHA-256: 48d7af7aa7fcc07e743fe06709cc3dcd8a71de0b25432e31c21763f2b51d487f
font_01_sfnt_off0000de6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE6E 9716 bytes
SHA-256: f5ceb4d78c3b04e11b53171f1489bd19baae240a7150f32f9d7b69d5abd463fe