Malicious PDF — malware analysis report

Static analysis result for SHA-256 14ab3dd7a5e3e83e…

MALICIOUS

PDF

79.7 KB Created: 2021-03-11 18:05:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 51a8a861435659e15b2295b2d6ee33a1 SHA-1: b7b36184eafb1905d20ee38164f60b43d6f341ff SHA-256: 14ab3dd7a5e3e83edec3857d4e284e3740cbd5345de43cbad7d0f07eb04c9051
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by 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 4

  • 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://dugedepap.ru/award?keyword=king+james+bible+genesis+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4413119/normal_5fc8af4811729.pdfIn PDF document text
    • http://vamofawevized.22web.org/supply_chain_management_for_mba.pdfIn PDF document text
    • http://dogalijun.scienceontheweb.net/46535227435.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476002/normal_603d074f78699.pdfIn PDF document text
    • http://mevixonur.mywebcommunity.org/april_2020_calendar_wincalendar.pdfIn PDF document text
    • http://wubegewefek.iblogger.org/sister_calling_ringtone_pagalworld.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488349/normal_5fd77b27cb5e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391308/normal_6048c84ea1982.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394082/normal_60325738454eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498868/normal_601e23a93746d.pdfIn PDF document text
    • http://vipadobotisituz.mygamesonline.org/how_to_get_better_at_stock_trading.pdfIn PDF document text
    • http://wugupomovupa.sportsontheweb.net/how_to_get_a_letter_of_recommendation_from_a_senator.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2f8a6ab9-e864-4757-b083-6627a13f4c48.filesusr.com/ugd/405339_dad0a443799b4946b92d228d045d735f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/defujo/guwelarevuw.pdfIn PDF document text
    • https://5e0c4d4d-41f9-428c-9564-b93e7cff6769.filesusr.com/ugd/510691_bfaf92ac64314fd2b2f97268136d04c6.pdf?index=trueIn PDF document text
    • https://0eaabcdb-938a-45a6-85a3-1a7d796bbcdd.filesusr.com/ugd/8d6d25_1862e4fb718a4f98a129a4d7285727c0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/rascals_movie_video_song.pdfIn PDF document text
    • https://2ddedb0e-b7b0-41c9-a8bc-c018bd0e6e4c.filesusr.com/ugd/70094d_e904d06f74fc41b79480317c0cb616f3.pdf?index=trueIn PDF document text
    • http://ziwemasux.myartsonline.com/vexixebifasofagurojega.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_off0000fc78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC78 5452 bytes
SHA-256: 8ee83248fa2c4ef13e7366c37be41fc649cc70c46e5dc9184b6e04c47c5368d7
font_01_sfnt_off00010efd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EFD 10224 bytes
SHA-256: 0277e7b137125f05da09f2bc6ee5c6895acf913e3c466aa101a79d70aeae0a8e

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