Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fe995336e0400cc…

MALICIOUS

PDF

79.4 KB Created: 2021-04-10 02:20:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 7482248968a914a79bc308a1db21242f SHA-1: 5b1116fa08a536a553541045a5a58ed7d7abf5d6 SHA-256: 0fe995336e0400ccc2d159d7969dd04a2624cf81064824e1f4894886eecd7492
186 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified as a link farm, with one URL pointing to fokemale.ru. This behavior, combined with ClamAV detection and ML classification, strongly suggests a phishing or malicious content distribution attempt. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of techniques used to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://fokemale.ru/strik?utm_term=cloudy+with+achance+of+meatballs+storybook PDF link annotation
    • https://cdn.sqhk.co/nijijitolow/eghsige/25279004998.pdfIn PDF document text
    • https://nijumaweka.weebly.com/uploads/1/3/1/3/131379182/1da05b9ef6bb4.pdfIn PDF document text
    • https://fajorisovobune.weebly.com/uploads/1/3/4/7/134752278/gojaletezoviwuxo.pdfIn PDF document text
    • http://palikexifumalam.mywebcommunity.org/bangladesh_govt_calendar_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/turovonunido/jgje22f/bungou_stray_dogs_tales_of_the_lost_events.pdfIn PDF document text
    • http://kejurudoji.medianewsonline.com/9551500375.pdfIn PDF document text
    • https://cdn.sqhk.co/rixosadiv/jeiiieU/vowopidezejeguwisofop.pdfIn PDF document text
    • https://situzofunuk.weebly.com/uploads/1/3/5/3/135305293/137bb8a3382851f.pdfIn PDF document text
    • https://cdn.sqhk.co/kavuzoda/jijhjhg/dream_football_champions_league_soccer_games_2020_hack.pdfIn PDF document text
    • https://kevosenebiv.weebly.com/uploads/1/3/1/8/131871602/kolemefino.pdfIn PDF document text
    • https://xunatopek.weebly.com/uploads/1/3/2/7/132710497/5646691.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0158ec2-48e3-4f4a-8e38-830c84583519/chefs_choice_1520_electric_knife_sharpener_reviews.pdfIn PDF document text
    • https://fd0ef26f-7b8f-4c91-b3b2-19f7ec93487a.filesusr.com/ugd/4174bf_d0d7a54d455f4ee4bce62e37ce7d48e4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/98293695888.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ac47273-da3e-449b-9500-8974c4f18a1a/command_prompt_commands_to_increase_internet_speed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e00f41be-6e77-466e-95f0-62a4e4e5efd9/62241601253.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/calorie_counter_fruit_and_veg.pdfIn PDF document text
    • https://891dfe3a-8969-4df2-b253-5ccc4ebbb7a0.filesusr.com/ugd/e66789_35affc92b3ed4fd4bf84209fab476c3f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/tejafiwiw.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/ghaziabad_gali_disawar_satta_ki_report.pdfIn PDF document text
    • http://jisijuvod.myartsonline.com/blue_line_schedule.pdfIn PDF document text
    • https://9ef77391-fdd1-48d8-ba15-364b07375333.filesusr.com/ugd/ebefdf_8916f520b88945e2b43332c38e238b6a.pdf?index=trueIn 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_off0000f886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF886 5564 bytes
SHA-256: a77fc3b0fddc11a968be553c5302bc62c3bc2a51e45c66392050e8622ed44686
font_01_sfnt_off00010b5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B5A 10716 bytes
SHA-256: 7be55f0097156ea22745d80fbeb10e309d2baab866f77c1daa559bdb90abf10f