Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ed51f6e9f342a0d…

MALICIOUS

PDF

76.7 KB Created: 2021-03-26 05:38:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 8f5a3813867c188249403162a2a7ba3f SHA-1: 59829636df052c339b4f644297050f577a46d74e SHA-256: 0ed51f6e9f342a0defddb49bc585a5c5e76465e589cc153e40767f6954c2bfe7
196 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to a domain associated with SEO spam and redirectors. The heuristic PDF_SEO_LINK_FARM and PDF_SEO_UTM_REDIRECTOR_LINK indicate a pattern of creating link farms to manipulate search engine results, likely to drive traffic to malicious sites. The embedded URL 'https://vilenefex.ru/wix?keyword=pedicabs+near+me' is identified as a potential phishing or malware distribution point.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://vilenefex.ru/wix?keyword=pedicabs+near+me PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/712d2f22-afbe-46d7-9bb5-4321c583812e/yamaha_dgx_640_manual.pdfIn PDF document text
    • https://74fc1a11-d445-4ffb-bc6b-7a79e5a65a18.filesusr.com/ugd/097bd5_ded9eea0145b44259ed8ea5dd782556c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/39358014510.pdfIn PDF document text
    • https://e9abb47e-19e5-4ec2-9f3c-2aa4e6f2bf0a.filesusr.com/ugd/92be99_d38c934b5419405590a7890b37b7c97e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/70b2d572-d407-4c92-8591-c91bee463033/how_to_make_a_wireless_camera_jammer.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/free_atkins_diet_meal_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/hp_probook_6570b_core_i3_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d185e3e5-4a76-4776-8012-c9d1b7db76d0/mastering_the_rockefeller_habits_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/meludav/98799537596.pdfIn PDF document text
    • https://1ce8651a-bfbb-4b9a-b1bf-24b3b574775a.filesusr.com/ugd/ac72e0_d2f2c1a223184ddab153f3cba34bdf9f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/117c85a9-41af-4d61-be0f-25f4581e7acf/libro_azul_2020_estados_unidos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc0448e1-1639-4c72-8237-b3b2b14c9758/nespresso_milk_frother_wont_turn_on.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e5d8b85-d918-475a-9b4d-fe1dc639b0d0/how_to_become_a_referee_for_soccer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77d86097-1107-43e9-aa7b-f5a30538b38d/62739242382.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/78706318771.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d9621ab-5c9e-4c0c-8697-b805cd70271d/nelufiduremitofudufud.pdfIn PDF document text
    • https://691dfa98-c543-4342-b77d-a3d7fbf094aa.filesusr.com/ugd/d55835_55caf215310d4615a8b4cbbff343724f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/78ac06f9-4cb9-442b-a906-fb31c08e5e3e/the_watsons_go_to_birmingham_1963_movie_trailer.pdfIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/arrte_avec_tes_mensonges_besson.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_off0000ed87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED87 5192 bytes
SHA-256: d6fe2fac7196341b1a848af12cc95941920a31e83bc392b5372a476a95aaf9db
font_01_sfnt_off0000ff12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF12 11824 bytes
SHA-256: b561904bee496e941e2df2f8ecb854e2066be6e49711a4f8757b2e5db8f61bd2