Malicious PDF — malware analysis report

Static analysis result for SHA-256 af9ad21fc46ed1e3…

MALICIOUS

PDF

77.3 KB Created: 2021-06-06 11:47:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: d3706a1d06c49cf68767f9071b617104 SHA-1: 7cc7015f4b3d829d5759f5db9cd28538c96f5ace SHA-256: af9ad21fc46ed1e3ee2a2fb030000ec427731d5f50d1f7063e00ec233ee4ddd3
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The presence of numerous embedded URLs, many pointing to disposable hosting, suggests an attempt to distribute malicious content or phish for information. Although no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it's designed to exploit vulnerabilities or trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 http://www.ascendercorp.com/ In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/bQ3nTxENlgE/wb?keyword=vfr%20sectional%20chart%20legend%20pdfPDF link annotation
    • https://uploads.strikinglycdn.com/files/1474f9d0-8a7e-415c-a6c7-8d955893b9a6/votaxisowotawavagubizeko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fe30ef6-5315-4c0e-90e5-867c22bb9a5c/after_chapitre_2_franais.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60418035-da92-432c-8d7e-22c8e3f9c157/77755268357.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7d9b65e-1147-4d60-a7b9-e6eedf30b75f/bose_sounddock_10_remote_app.pdfIn PDF document text
    • http://furalagaposu.pbworks.com/f/tegoviresorovizidebavi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dce95636-a0d5-43da-ad0e-b8107f1d8905/how_do_you_smoke_spare_ribs_in_a_masterbuilt_electric_smoker.pdfIn PDF document text
    • http://fepewuwakow.pbworks.com/f/what_is_the_theme_of_macbeth_act_1_scene_4.pdfIn PDF document text
    • http://disisopaz.pbworks.com/f/pobejobapedupuvajupi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80d639f5-a06d-4f1b-8de4-90fa152bc715/brother_hl-2270dw_wifi_setup_mac.pdfIn PDF document text
    • http://rijunepupuja.pbworks.com/f/1853065145.pdfIn PDF document text
    • http://xuresasadox.pbworks.com/f/lirunamebiginagajevob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f52b6e75-6684-466d-86ee-d19238be44c1/vekodalawawer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d91ecf58-7214-4fb0-bbd7-78330d3585ee/24043094855.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ace77d2-d0fe-429a-a7ac-210e7cbd6f20/kesumode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ef44f27-e079-4ed6-8b33-71837b02641e/pixusubobipu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa2e0684-87ea-4f2d-a31c-8daf10a36012/best_fb_auto_liker_app_2020_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6435db90-9038-43f3-ba32-c59ccfd44372/how_much_does_asbestos_sheet_weigh.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44f72af4-617f-4115-b5b3-ddeb9c2df460/didok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecdefc39-8672-4519-adde-7bc30eebf03e/sagamejak.pdfIn PDF document text
    • http://beratirupo.pbworks.com/f/jumuwotegotawurekutedod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cdb9396-29e1-4f26-b61d-9c70dc83ec95/hacksaw_ridge_full_movie_download_in_dual_audio_720p.pdfIn PDF document text
    • http://favixose.pbworks.com/f/78427858551.pdfIn PDF document text
    • http://biduzoku.pbworks.com/f/13779252274.pdfIn PDF document text
    • http://nipekari.pbworks.com/f/mere_peer_ki_gulami_mp3_song_download_pagalworld.pdfIn PDF document text
    • http://nugewus.pbworks.com/w/file/fetch/144657360/cgegis_contribution_rules.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_off0000f09a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF09A 5384 bytes
SHA-256: f00c3007d8eaa5e8e5bbb43c0a24b4e15f8664dce398024ec470fb176d813219
font_01_sfnt_off000102ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102EC 10856 bytes
SHA-256: 69b93ea3947376c27d5e332c11beaeecd64d0600405cfee8348f63c2f026b2ed