Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dca899bbfed7ee4…

MALICIOUS

PDF

74.1 KB Created: 2021-02-15 15:45:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 56cc832c54ce5915bd9e6d73deb3ffa5 SHA-1: 59d61aeddba4182eafade38fa711c8b753b91040 SHA-256: 3dca899bbfed7ee41b5b3cf248fa4d79fa7f136de13c17e1cdeca4c2bba81d0d
126 Risk Score

Malware Insights

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

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://druttle.ru/strik?utm_term=cuisinart+14+cup+food+processor+replacement PDF link annotation
    • http://servempieza.site/cello_imperial_march_sheet_musicuhetk.pdfIn PDF document text
    • https://cdn.sqhk.co/xenojepezere/9ggRjgL/time_to_plant_flower_bulbs.pdfIn PDF document text
    • http://naturaitalia.space/jimibijenezoxidefukimineba17m7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451368/normal_5fe05fc2b44a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455380/normal_5fe67a0acc2aa.pdfIn PDF document text
    • http://wssummer.space/sejisejajefebonitobed2oy0p.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468259/normal_5fcff4e9da50d.pdfIn PDF document text
    • https://cdn.sqhk.co/wikaraxixi/hhbrRHO/escape_plan_3_trailer_espanol_latino.pdfIn PDF document text
    • https://cdn.sqhk.co/puvegipuros/icifOjg/robot_sharkboy_and_lavagirl.pdfIn PDF document text
    • http://begemotiks.space/derapulw8ww8.pdfIn PDF document text
    • https://cdn.sqhk.co/dorusafe/jVFA7jb/defend_the_bunker_2_mod_apk_download.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/dozuga/holy_bible_king_james_version.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/time_dilation_and_length_contraction.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/angry_birds_transformers_hack.pdfIn PDF document text
    • http://dilalixurapa.epizy.com/zezutiguvomatega.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_off0000e2e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E6 5348 bytes
SHA-256: 992e64634504f1b76b31246f4f260a23ce7789e6dcfbee7a8f30075435ffa6a0
font_01_sfnt_off0000f503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF503 11136 bytes
SHA-256: 62f897397a8b6cc305af95b709d9cbde3d133d30678951d0d8b307b70c8c884a