Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac80e8071aa12303…

MALICIOUS

PDF

72.9 KB Created: 2021-03-17 21:30:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4de4e2bb62871aa677ce1f32f4731a5b SHA-1: 5a6887347af0f68e673f2b3ccbd5ed29984e7b66 SHA-256: ac80e8071aa123036909c16f4467feede2d97ee553cd5cb1e116cbae2b8b7207
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/strik?utm_term=crossfire+series+book+1+pdf PDF link annotation
    • http://raifaisentapp.online/biotic_and_abiotic_factors_of_ecosystemiw64r.pdfIn PDF document text
    • https://gebiworopefibo.weebly.com/uploads/1/3/4/5/134583098/74164.pdfIn PDF document text
    • https://xomixosusanit.weebly.com/uploads/1/3/1/4/131438267/renovulenimiveteseme.pdfIn PDF document text
    • http://ruguwafe.scienceontheweb.net/war_of_the_worlds_2_the_next_wave_full_movie_123movies.pdfIn PDF document text
    • http://tramlaweq.online/18504317659btzjz.pdfIn PDF document text
    • https://xigujevaw.weebly.com/uploads/1/3/4/7/134701692/1712bd43b381.pdfIn PDF document text
    • https://cdn.sqhk.co/zubixola/jLhehiL/class_dojo_videos_empathy_3_3.pdfIn PDF document text
    • https://xukizawumu.weebly.com/uploads/1/3/1/3/131380236/tibasozobaris-lodewolidelefux-lijumabenumuto.pdfIn PDF document text
    • https://cdn.sqhk.co/bujerinalo/jaxic6c/febenivoxunezuzadonisup.pdfIn PDF document text
    • http://korirojasutito.22web.org/chloroform_spray_buy_online_in_bangladesh.pdfIn PDF document text
    • https://cdn.sqhk.co/pinofizulag/ahhjiKc/maxpreps_5a_football_rankings_alabama_2019.pdfIn PDF document text
    • https://rubisudowe.weebly.com/uploads/1/3/4/7/134766222/232857337d3.pdfIn PDF document text
    • http://pewadulojuba.mypressonline.com/66296247338.pdfIn PDF document text
    • https://cdn.sqhk.co/veleviziwew/IYV28jh/green_potatoes_inside.pdfIn PDF document text
    • http://raisinshub.pro/10667659332harc5.pdfIn PDF document text
    • http://kilijosizujowo.medianewsonline.com/4th_grade_math_word_problems_multiplication_and_division.pdfIn PDF document text
    • https://cdn.sqhk.co/salefudodid/eVgfifk/ten_facts_about_world_war_2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zizumanoxiv.epizy.com/57314687299.pdfIn PDF document text
    • http://bejanifezilo.atwebpages.com/would_you_rather_questions_for_guys_flirty.pdfIn PDF document text
    • http://suvowafavij.epizy.com/59917396884.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01436c55-b017-4167-80cc-25d43aa717d3/96528768490.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c485a2af-014c-44ce-887e-f59f5da07b26/tufaregefe.pdfIn PDF document text
    • http://bojibag.epizy.com/dart_league_score_sheets.pdfIn PDF document text
    • http://fokodema.epizy.com/fulewabaverugopajox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23a4ed48-93e8-41cb-9b67-1c85d2a1926b/resumen_novela_doa_barbara_romulo_gallegos_por_capitulos.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_off0000e116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE116 4952 bytes
SHA-256: df10398441226680ee3d4615c34c61d3f2dc2af00eb6b1ee7f732779e22ebce4
font_01_sfnt_off0000f1fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FE 10528 bytes
SHA-256: 4f636080001abdd5275bfd83434680ca1c2b816326ce4948cf56186227737393

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