Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0d1b4909b4d7cc6…

MALICIOUS

PDF

74.5 KB Created: 2021-03-25 03:13:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b572f665bc05aa3f106b52c7031b58f SHA-1: 4b199c7e1fb26230df97ab22bef52448733b7aa5 SHA-256: e0d1b4909b4d7cc66da10ff7857bccdbc8ba3373f7e7d1dd5a969ba7a67d6c3a
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a phishing or malicious redirection scheme, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://lozipotod.ru/award?keyword=o+alienista+hq+pdf
    • https://gimitowogavu.weebly.com/uploads/1/3/4/7/134746983/sivedazo_notimidilu.pdf
    • http://kernig.online/30916642869n4gb3.pdf
    • http://lnstagramcopyrigtservice.com/vikuwujulonuzuwuxudisirurop8f.pdf
    • http://blue-tick-central.com/83983377151dbw3j.pdf
    • http://noksipals.online/tercer_cielo_yo_te_extraare_descargghda6.pdf
    • https://kidamevu.weebly.com/uploads/1/3/1/4/131437276/3561673.pdf
    • https://tonituligavu.weebly.com/uploads/1/3/4/8/134884188/7852568.pdf
    • http://letgtma.bid/english_speaking_books_in_marathi_freeqv4c2.pdf
    • http://nifazafagikoxa.medianewsonline.com/beginnings_chicago.pdf
    • http://gukiduwonaxinef.getenjoyment.net/alopecia_en_mujeres_tratamiento.pdf
    • https://bazulerijodinib.weebly.com/uploads/1/3/1/8/131856415/920b6.pdf
    • http://zunuruxeguxifi.mygamesonline.org/armies_of_sand.pdf
    • http://bodipok.getenjoyment.net/chemistry_of_boron_family.pdf
    • https://tewubituzidebu.weebly.com/uploads/1/3/4/3/134359488/zitewobezugetel.pdf
    • http://wisecredit.info/16455331817jbfqo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/29377b5d-54c4-4a41-8772-d3c0902d8af6/gisixidupezufapugafeporag.pdf
    • https://uploads.strikinglycdn.com/files/73d6bd98-4a6c-4f04-bed6-1886ca23517a/large_caramel_iced_coffee_dunkin_donuts_nutrition.pdf
    • https://uploads.strikinglycdn.com/files/d0e050a2-0803-4056-95a0-8368877ce088/el_lazarillo_de_tormes_english.pdf
    • https://uploads.strikinglycdn.com/files/0349e6ed-e0b0-42d7-99b6-65d57e351260/rexajo.pdf
    • http://tikomiwewo.atwebpages.com/tabla_de_conversion_de_pulgadas_a_centimetros.pdf
    • https://uploads.strikinglycdn.com/files/3be9ede5-1540-4d22-ae02-40b8958d8d3a/comment_codes_for_stars_classroom.pdf
    • https://uploads.strikinglycdn.com/files/7309c2ab-b3b6-4202-8eaa-2c4d44c09d72/self_presentation_in_english_job_interview_example.pdf
    • https://uploads.strikinglycdn.com/files/4590ad87-0435-4264-bdd6-1b48c8c462ea/new_jersey_apartment_lease_forms.pdf
    • https://uploads.strikinglycdn.com/files/f8b755ef-0ea5-457e-b479-c58fc8b13b3a/bugera_v22_repair.pdf
    • 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_off0000e2ae.bin
a517e5f53603136ab54106a937362cf5413d3b4f8fd4b775392a883a2fedefcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AE 5188 bytes
font_01_sfnt_off0000f44f.bin
e5ce367fcc2e0d582f664ac06f4639be5d6cd96c80eaadd0f5513e175df05261		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF44F 13092 bytes

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