Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b676c85626a357d…

MALICIOUS

PDF

89.3 KB Created: 2021-05-16 16:08:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 11fff13921bf3e7c13e584267aced420 SHA-1: 535e936ff6fe63fcad2a90866d3883e2b6ee3343 SHA-256: 9b676c85626a357d48673a4c67f44d5625acf64a60a6b9983e4547e4c3843152
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 0.9997

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/strik?utm_term=maschine+studio+mk3+unterschied PDF link annotation
    • http://sarumusud.iblogger.org/bhaagamathie_tamil_movie_hd_tamilrockers.pdfIn PDF document text
    • https://cdn.sqhk.co/badaxiloru/6henjhZ/navy_plane_simulator_3d_online.pdfIn PDF document text
    • http://geloritiveda.mygamesonline.org/zuzixowosekokeda.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvisisitinu/gjbijuv/atif_aslam_song_download_mp4_audio.pdfIn PDF document text
    • https://cdn.sqhk.co/delopomixaba/hdgdJgh/jijetudufut.pdfIn PDF document text
    • http://zofiziz.getenjoyment.net/bupaz.pdfIn PDF document text
    • http://pubofumoxo.scienceontheweb.net/avivamento_pais_de_gales.pdfIn PDF document text
    • https://cdn.sqhk.co/lewoxiguj/d0vhawO/soccer_coaching_tactics.pdfIn PDF document text
    • https://cdn.sqhk.co/sijiposago/9Uicibh/xatevixekegugakoxugiken.pdfIn PDF document text
    • http://card2card-perevod24.site/tipinemawekumavavutoouepb.pdfIn PDF document text
    • http://timelessdecorum.com/1800189022973cqq.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zerakunutage.epizy.com/game_boboiboy_apkpure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b2c593c-1f2c-4093-9a2b-bd3f48f86076/nufakinubo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14481b21-5eb3-4682-8ba8-5053a238381f/sipasigiwarudijazifewo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9183449-8d2e-4db7-810a-86525016c04d/brother_cs6000i_computerized_sewing_machine_video.pdfIn PDF document text
    • http://lurolubudoruk.onlinewebshop.net/modokajekebososoxumar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf7cba34-7df3-497c-94ab-90296dec8f13/swat_model_training_courses_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbf88917-d9cf-4eb7-93c6-b19ef36b15c8/netgear_cg3000d_wifi_not_working.pdfIn PDF document text
    • http://newurefaz.epizy.com/ratipetotojawufepopi.pdfIn PDF document text
    • http://woranuganavot.myartsonline.com/73976491451.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00010d28.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10D28 13376 bytes
SHA-256: c664541503300707127c998722a0a32555c9ec8ce16d57e9498b9179d102c0e3
font_00_sfnt_off0000fb0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0C 5380 bytes
SHA-256: b126a69631eb739980a80893043f50b6d996a2f10e575d645a5e275a8efd21d2
font_02_sfnt_off0001325f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1325F 10968 bytes
SHA-256: 1f09d995a3a411b4d6ffd896cead0f1920c3b244acec622f510b5460f0ff7a8d

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