Malicious PDF — malware analysis report

Static analysis result for SHA-256 0da8866c478ad029…

MALICIOUS

PDF

84.2 KB Created: 2021-03-15 08:03:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4d341914238e4b7b1042c731b68599ab SHA-1: 2a4446060c27d9b76338425258d8b7d947d46988 SHA-256: 0da8866c478ad02953f4f20ad0e16d1f82510eef72456f7bb6ab785ec17ef58e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://baarspo.ru/strik?utm_term=crossfit+wod+app+ios PDF link annotation
    • http://rokonagusedat.22web.org/android_games_free_in_jio_phone.pdfIn PDF document text
    • http://bumadodari.iblogger.org/cuisinart_2qt_ice_cream_maker_directions.pdfIn PDF document text
    • https://cdn.sqhk.co/xawemubimaj/8bqjbSM/14636905306.pdfIn PDF document text
    • http://fitokapss.xyz/dovejefoohqh.pdfIn PDF document text
    • http://vumoramoguko.22web.org/arduino_software_for_android_tablet.pdfIn PDF document text
    • https://kasezikibojeg.weebly.com/uploads/1/3/1/8/131871727/05e1ab6a.pdfIn PDF document text
    • https://cdn.sqhk.co/mudifuto/ij6hjLz/gumaragifikuni.pdfIn PDF document text
    • http://copyrightproblem.com/nujijizisuruvubewarimugigewrmd.pdfIn PDF document text
    • https://wekisakalew.weebly.com/uploads/1/3/4/6/134617168/2ca89063.pdfIn PDF document text
    • http://blablablacar.online/824701247459eg57.pdfIn PDF document text
    • http://ewop.space/banezamoj5l2t.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/zuguvoxoki/datufutuvikusiferiguzav.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/los_angeles_county_assessor_annual_report.pdfIn PDF document text
    • http://bonanelokuweje.rf.gd/the_american_scholar_emerson.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/28816618511.pdfIn PDF document text
    • http://kagufunoziwezu.epizy.com/bram_stoker_s_dracula_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6db47dcf-ad21-490f-a768-d16370b789f6/what_kind_of_cord_charge_a_ps3_controller.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/bollywood_movies_2019_site.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03c4d095-2c32-4a28-b53c-5e7ad6151d9b/reading_comprehension_test_for_grade_3_with_questions_and_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9B 5000 bytes
SHA-256: f79ecb1c69340e736e1396f1e5ddcc106f5f42fb26e37eb1e1d1d654b579dbc6
font_01_sfnt_off00010db6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB6 4376 bytes
SHA-256: d99d01523b1a307b502d6255d17f7bb7a688d758d526ef68b9b4573dd47a0f26
font_02_sfnt_off00011997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11997 12792 bytes
SHA-256: 2ec729bcc69554a97e3fdcaa562949fd7d9470c840f040bbedcb4bcf7ec85b19