Malicious PDF — malware analysis report

Static analysis result for SHA-256 254502fe721b5812…

MALICIOUS

PDF

159.3 KB Created: 2021-06-05 06:40:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8002920f8dd33917c6f25b1c55a01e27 SHA-1: 74e55db972339e831cae3d63d4a2805d15313eb2 SHA-256: 254502fe721b5812a7c12555979b99d998ea54c64ee31e04c37cdad338c7cd0d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9978

Heuristics 5

  • 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 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://huntic.ru/pbw?utm_term=how+to+make+biblical+anointing+oil PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4452862/normal_6007279677075.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454182/normal_606491888e705.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386597/normal_60baa05468026.pdfIn PDF document text
    • https://vumopiwerelo.weebly.com/uploads/1/3/4/7/134730258/feviridupag.pdfIn PDF document text
    • https://weziriditovi.weebly.com/uploads/1/3/4/1/134108838/vebevalodilopu_tevevamejov_jaxebud_dinevon.pdfIn PDF document text
    • https://nenafefetu.weebly.com/uploads/1/3/1/4/131406263/9003619.pdfIn PDF document text
    • https://mibigadoguful.weebly.com/uploads/1/3/4/7/134759919/107e35cbe0d4b.pdfIn PDF document text
    • https://mitometivu.weebly.com/uploads/1/3/6/0/136094147/24c952b84.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413346/normal_6000f5681ec3f.pdfIn PDF document text
    • https://wigawiwamenusum.weebly.com/uploads/1/3/5/3/135323889/83eaaee41.pdfIn PDF document text
    • https://tigidebo.weebly.com/uploads/1/3/4/7/134740117/0642efe9cb79b.pdfIn PDF document text
    • https://fejomuzuzozasas.weebly.com/uploads/1/3/4/7/134748710/9473906bf.pdfIn PDF document text
    • https://sibolapitabake.weebly.com/uploads/1/3/4/4/134469628/niwilomumelebikibaxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389823/normal_60100e3d26f9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484118/normal_6041caa30257e.pdfIn PDF document text
    • https://zorepuwozodu.weebly.com/uploads/1/3/4/3/134399810/narajurezixugexod.pdfIn PDF document text
    • https://notaxivarem.weebly.com/uploads/1/3/4/6/134633458/9119403.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404490/normal_5ff47be9ea485.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376375/normal_60134069739a2.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/03715360-3de5-4702-879d-032dee06ecba/18634708166.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/272ee3f7-f607-4275-ab8f-f3de57b495c9/64239466944.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acfed229-66aa-4128-a689-45b9d57435c5/behavioural_sciences_mowadat_rana.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00020602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20602 4892 bytes
SHA-256: 1064d25cb8d41b0a6069482ce28c129ccc03b1bd1bd4ca3ae370e92122cc878f
font_01_sfnt_off0002169f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2169F 17016 bytes
SHA-256: f6ada2ebbddeec6038cec2dd2b5a1355b139444bc81baabc164eda93c34df62a
font_02_sfnt_off00024bc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24BC9 16128 bytes
SHA-256: cc0659fcbd6063ace5f9d5dada08d50f148173b3916349025cf53ed78c5889db
font_03_sfnt_off000260b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x260B9 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3