Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6799a5a8c35f1ba…

MALICIOUS

PDF

83.0 KB Created: 2021-03-14 21:55:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a2ad788c08720fd514a8417a1ef3f03 SHA-1: 2a404c3d750019a4587e402bfde991f93ca7316f SHA-256: f6799a5a8c35f1ba961be19299a6ab9636e663da2072a7db9a7e68952eeb7bdc
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or SEO spam operation. One prominent URL, 'https://pelibifir.ru/123?utm_term=managed+services+agreement+legal+template', is embedded within the document's text, masquerading as a legal template to entice clicks. While no scripts were explicitly extracted, the PDF structure and extensive external linking are indicative of malicious intent, likely for traffic generation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://pelibifir.ru/123?utm_term=managed+services+agreement+legal+template
    • https://pirivelel.weebly.com/uploads/1/3/4/5/134505874/cd8550.pdf
    • https://musazejat.weebly.com/uploads/1/3/1/1/131164110/donimeluz_judemabidadam_danikowu_gibogaxepoxes.pdf
    • https://jafakafewubili.weebly.com/uploads/1/3/4/3/134397715/koxurof.pdf
    • https://koxawikala.weebly.com/uploads/1/3/4/6/134643159/loneve-dabojoraga.pdf
    • https://wobofosowipifir.weebly.com/uploads/1/3/0/7/130776138/povifum-mowibuxoxam-fejilevafufak.pdf
    • https://pegugigatusib.weebly.com/uploads/1/3/4/4/134460290/8298174.pdf
    • http://wamabivunufoteg.medianewsonline.com/75503365271.pdf
    • https://xududegugi.weebly.com/uploads/1/3/1/6/131636960/09abfa14bae06.pdf
    • https://wixolovab.weebly.com/uploads/1/3/0/7/130776385/damisanixugofax.pdf
    • https://mimevomakiket.weebly.com/uploads/1/3/4/6/134693464/9687393.pdf
    • http://wugupomovupa.sportsontheweb.net/xefituluzomevewo.pdf
    • https://viferoxabuged.weebly.com/uploads/1/3/4/2/134235394/9be214090.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d9d7cf4c-da6c-401d-82e7-8f4b77bf7ad5/lista_de_verbos_irregulares_en_ingls.pdf
    • https://s3.amazonaws.com/gupojakami/martin_luther_king_letter_from_birmingham_jail_essay.pdf
    • https://uploads.strikinglycdn.com/files/700b7224-5ca7-4b5d-83e4-d576096110af/how_to_create_a_flow_map.pdf
    • https://uploads.strikinglycdn.com/files/555b564b-df0f-4f0c-8ca9-fbf769e74c49/bemarexiterasifis.pdf
    • http://pozidijapepore.atwebpages.com/87575134771.pdf
    • https://uploads.strikinglycdn.com/files/7da235ff-800d-48f9-9824-f8a410f7893d/what_is_the_greatest_invention_in_the_history_of_electronics.pdf
    • http://xifeloj.onlinewebshop.net/femigogatusiwanavoke.pdf
    • http://gogujigasad.onlinewebshop.net/medogemon.pdf
    • https://uploads.strikinglycdn.com/files/6f886084-3160-4b90-ac6c-28373abf904d/famabekoli.pdf
    • https://uploads.strikinglycdn.com/files/4e65b4cf-1eec-4511-b6bb-96051abc99ab/stage_of_industrial_revolution.pdf
    • https://s3.amazonaws.com/fovezewi/mapsource_south_africa_free.pdf
    • https://uploads.strikinglycdn.com/files/08277f48-4c61-4a66-a2b1-0a3a619148b2/subozupesilorizazudekodu.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_off0001038d.bin
c5a12f3d184edcb5d157284e5cf015f530481d19f3561cdab7184e522e35ccb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1038D 5460 bytes
font_01_sfnt_off0001161c.bin
6c44a006b59bd3530a04cf61d84cebabc2a83902f1d1fd4cad6c2a5952d455ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1161C 11400 bytes

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