Malicious PDF — malware analysis report

Static analysis result for SHA-256 26fca6654cb11ca6…

MALICIOUS

PDF

68.9 KB Created: 2021-03-06 05:13:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: fd3d4cc75aba992f44defb6733bc694e SHA-1: c5da7b5b2622d5d45447988dddfb11b796cc7a0f SHA-256: 26fca6654cb11ca6f0bc6010906cb8c114174a880193c98c3cec1d379b1df033
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://xajibur.ru/wix?keyword=reflexive+and+indefinite+pronouns+worksheet PDF link annotation
    • http://wildboost.club/tibedozaxiyl83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386336/normal_603878ac01526.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465392/normal_5fd65bb0b4f0a.pdfIn PDF document text
    • http://accface.in/526791480900v8rq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501045/normal_601378b3f04f5.pdfIn PDF document text
    • http://clientesdkb.com/wajodiwiniwavevakc5w.pdfIn PDF document text
    • http://yourdesk.website/ordering_fractions_decimals_and_percentages_worksheeti5uhn.pdfIn PDF document text
    • http://granitmetrospecstroy.ru/texto_argumentativo_expositivozlf64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373778/normal_6035ad8b93caf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/23244942899.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/guided_sleep_meditation_for_social_anxiety.pdfIn PDF document text
    • https://c554ea1b-4fb7-4d3e-a2ee-dd03d7bf5c37.filesusr.com/ugd/b3bc21_fb667c5511c5486091f30c0af917a1f1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bisiku/50116135009.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/91957554238.pdfIn PDF document text
    • https://4ac36a2f-1533-488b-b282-cf34cdace458.filesusr.com/ugd/bcfc12_d20142bc01ee482f9ddac020b8845a30.pdf?index=trueIn PDF document text
    • https://d4f4546a-a836-4b3d-8651-c56b89608eca.filesusr.com/ugd/3e9e83_34b96280606b43a4a50ccd0fd39f3ec3.pdf?index=trueIn PDF document text
    • https://8316a071-1c81-4729-bbc9-bb84f51c1359.filesusr.com/ugd/b2ba6b_fcadf78d997644c0bf1c3af52eec0001.pdf?index=trueIn PDF document text
    • https://7fad2989-91b8-457c-89bc-9a0e7aeef19f.filesusr.com/ugd/b03ff3_fedab9a4da77461e87ceae51bf797e12.pdf?index=trueIn PDF document text
    • https://4be8a7ba-6c9a-47a4-99fc-a5961b41a404.filesusr.com/ugd/132250_3e297b3d7bb14d028e1129ff601197e4.pdf?index=trueIn PDF document text
    • https://5e54d98c-4257-4cc7-9010-48f3df296eb2.filesusr.com/ugd/05240c_a42000e06cf44a54a19dc5cb8fcb8d7e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/geometric_sequence_and_series_worksheet_kuta.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_off0000d0d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0D7 5420 bytes
SHA-256: 2e5eeae908c6236011c85561b6ed70d59c18cfb0735a22b08e5d3292619cf1dd
font_01_sfnt_off0000e365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE365 10160 bytes
SHA-256: 0fb0329d60257be8887b61c2dd456c67f1059e8d3c991c57ce504adfc46dfd06

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