Malicious PDF — malware analysis report

Static analysis result for SHA-256 af2beed1de2ecc9c…

MALICIOUS

PDF

76.7 KB Created: 2021-03-30 00:08:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 96568f68dca91ef771dd84b4b5506b9f SHA-1: cf7990e89dcd9ed3cbc427dd876f88be08eb9776 SHA-256: af2beed1de2ecc9c441c03a45e9f3c10e1159c3ad958634fcfbd0369312597ca
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous embedded URLs, indicating it functions as a link farm. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests these links are intended to direct users to potentially malicious or phishing sites. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/strik?utm_term=can+you+use+honey+to+make+simple+syrup PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4419654/normal_601cf2663a605.pdfIn PDF document text
    • http://vadosaj.getenjoyment.net/how_to_unlock_panasonic_air_conditioner_remote_control.pdfIn PDF document text
    • http://productwood.ru/how_many_calories_in_subway_6_inch_tuna_flatbreadvvhgx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426063/normal_5fd927843a517.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387235/normal_5fed90e19c724.pdfIn PDF document text
    • https://cdn.sqhk.co/mepapogivoma/iihbhbW/kagigewoguvilisebosojexi.pdfIn PDF document text
    • https://cdn.sqhk.co/duputokodoz/jevHGhc/making_things_with_paper_videos.pdfIn PDF document text
    • http://wulutapebime.getenjoyment.net/nebokojaxo.pdfIn PDF document text
    • http://wapividazofar.scienceontheweb.net/cien_aos_de_soledad_resumen_corto_yahoo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379961/normal_605f9cace04ab.pdfIn PDF document text
    • http://sibatike.getenjoyment.net/jayco_hummingbird_owners_forum.pdfIn PDF document text
    • http://artrosil.xyz/54107960372czoxb.pdfIn PDF document text
    • http://sait-ok.ru/metal_gear_solid_5_phantom_pain_xbox_oneiz4kq.pdfIn PDF document text
    • http://tejasatobes.medianewsonline.com/lidinagiw.pdfIn PDF document text
    • https://cdn.sqhk.co/kinubowa/iiifrjj/53376766250.pdfIn PDF document text
    • https://cdn.sqhk.co/keropolor/e2ZQibi/31577637469.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/e42c1180-b16d-44e1-ac18-07188e9504b6/lizipiwerosox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8ee6639-0930-4731-bfc5-643bb9c78615/como_hacen_el_examen_de_covid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91aec161-ea6b-4c1b-8491-1d0fe19770e0/rovibax.pdfIn PDF document text
    • http://wovuluvoju.onlinewebshop.net/is_chi_a_good_brand_shampoo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ad0e343-5ee3-4a9b-b8e2-23f92f39985e/organizational_culture_and_leadership_fourth_edition.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_off0000edf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF5 5132 bytes
SHA-256: 54c1b384dde4fb0a34a20883047e5941f5aebb128ca1ff485ec12546eedc8683
font_01_sfnt_off0000ff3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3F 11304 bytes
SHA-256: 5727b93be18e768dfbcc843e7d1b6979d8bb4d3e22e008cf5c603062140718e3

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