Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5d6a6c5b92b5f22…

MALICIOUS

PDF

77.5 KB Created: 2021-03-28 02:02:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e1d4bca16330f37effb0801f4ee1062 SHA-1: d556fa126468e7c416554d7ab4cf385988f3fe4a SHA-256: f5d6a6c5b92b5f226639491f6c7d7b87d44f0ca2e13c80889336304ea246e24a
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are disguised as search results or benign-looking documents, indicating a link farm or phishing attempt. The heuristic PDF_SEO_LINK_FARM and the ML_NYX_PDF_MALICIOUS classification strongly suggest malicious intent. The primary IOC is the external URI pointing to a suspicious domain, likely used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/strik?utm_term=dale+earnhardt+sr+cars+for+sale
    • https://cdn.sqhk.co/lofujumixas/P7iihgt/67999158901.pdf
    • https://cdn.sqhk.co/gozilade/jdQC5wE/67346841774.pdf
    • https://cdn.sqhk.co/kitaparek/icqNnoU/72730638616.pdf
    • https://cdn.sqhk.co/gabixeme/uQTcchc/halloween_wallpaper_scary.pdf
    • https://cdn.sqhk.co/jizuxadif/wkcPLjb/78545700216.pdf
    • http://sarumusud.iblogger.org/benchmarking_exemplos_praticos.pdf
    • https://cdn.sqhk.co/vozeseseber/jaSUjfx/heroes_a_grail_quest_apk_revdl.pdf
    • https://cdn.sqhk.co/fapulatonupe/tdjhibK/skyrim_ancestral_worship_guide.pdf
    • https://cdn.sqhk.co/fupokonabat/2ibhaA7/xuxuwopelux.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/27e39976-37f1-4a13-a997-f886114c4d51/what_is_ray_tracing_rendering.pdf
    • https://uploads.strikinglycdn.com/files/0e039b17-1fcd-4f7c-ba5f-7dc689811a16/38943990661.pdf
    • https://uploads.strikinglycdn.com/files/e297ffbf-5741-4166-9eb0-c81a5f7d6611/how_to_put_a_belt_on_kenmore_dryer.pdf
    • https://uploads.strikinglycdn.com/files/f3382ded-6eb1-4659-b244-f1cd9b8b84ab/82702971330.pdf
    • http://varaxekewuveza.epizy.com/brunswick_pro_bowling_pc_game.pdf
    • https://6d4cd3b7-91e9-43ac-92b9-205473f1e50d.filesusr.com/ugd/28146e_34701e005cd4413e9172fcecb65061b4.pdf?index=true
    • https://uploads.strikinglycdn.com/files/7fa97274-3d9b-4e8a-84b6-f4f091d2281d/insinkerator_evolution_select_plus_3_4_hp.pdf
    • https://b54663a3-ff9d-4122-b75c-69b71428c9b0.filesusr.com/ugd/cfa91a_4a71fa8b43d14d859441c9badec272bc.pdf?index=true
    • https://uploads.strikinglycdn.com/files/252faf6b-613e-4476-a307-b8ca68b5cc29/john_deere_410_backhoe_for_sale_in_california.pdf
    • http://beboxunedux.epizy.com/wifadar.pdf
    • https://8ac5c8e1-9174-427d-95c2-90bebb9f105a.filesusr.com/ugd/44b221_bddcb8bd4e2044fdb542ef411fcdacad.pdf?index=true
    • https://uploads.strikinglycdn.com/files/1fbb417e-1612-45fd-9323-d8cc29486560/keurig_2.0_k-carafe_instructions.pdf
    • https://c18d9829-3add-4afa-bc87-35007fe3998a.filesusr.com/ugd/70c1ec_82e20e4a79a145f99ddaa89ca1254831.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f20b.bin
31e4c689ab357cb5c6900b0fa08fe3eef1842347e8a7961371c3bcb4f1878b46		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF20B 5108 bytes
font_01_sfnt_off0001036a.bin
ec3695a6887ae1b3a434ab04565be21fd6a2fcad90e2161763b289d19fc14555		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1036A 10736 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.