Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dd7f6cec5219f65…

MALICIOUS

PDF

74.5 KB Created: 2021-03-01 04:43:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2b9805a08546ec1e4c919e3b75d9b4a2 SHA-1: fc15c7edd89e338d73ccba051fff1bdf051e622f SHA-256: 0dd7f6cec5219f651e39dc20129b95dbb5941275dfea49d23793e140bce10945
284 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.007 JavaScript

This PDF document contains numerous links to external resources, many of which are hosted on disposable domains and appear to be part of a link farm. The document's content and heuristics indicate a lure for remote support tools, suggesting an attempt to gain unauthorized access. The presence of multiple malicious redirector links and a high ML classifier score further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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.
  • 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://dafemum.ru/wix?keyword=transformation+lab+report In PDF document text
    • http://xifadezuzurap.medianewsonline.com/world_war_1_test.pdfIn PDF document text
    • https://cdn.sqhk.co/vikoparif/jhgjhf8/old_bollywood_songs_guitar_tabs.pdfIn PDF document text
    • https://lurabesuweki.weebly.com/uploads/1/3/4/5/134524451/2a88d3ed0.pdfIn PDF document text
    • http://puzexijabin.mypressonline.com/83501127098.pdfIn PDF document text
    • http://epipog.com/org._apache._kafka_latest_jary2vwe.pdfIn PDF document text
    • https://cdn.sqhk.co/doginifa/VDgdkih/55263615952.pdfIn PDF document text
    • http://niludop.22web.org/sejozaj.pdfIn PDF document text
    • https://cdn.sqhk.co/vodadavubex/vmjbOyy/teamviewer_quicksupport_ios_screen_sharing.pdfIn PDF document text
    • https://nokaxogu.weebly.com/uploads/1/3/4/5/134520383/b60d1daf10d91b7.pdfIn PDF document text
    • http://uaportal.site/25715536522hv4nu.pdfIn PDF document text
    • https://kuwodugedo.weebly.com/uploads/1/3/0/7/130739904/gawul_duxovur.pdfIn PDF document text
    • https://cdn.sqhk.co/mojekuvugise/NGEicgg/23068531978.pdfIn PDF document text
    • https://cdn.sqhk.co/dolitife/Mlr9jir/healing_arts_the_history_of_art_therapy.pdfIn PDF document text
    • https://cdn.sqhk.co/puruwedisuma/jeidgig/red_button_games_on_sky_sports_app.pdfIn PDF document text
    • https://fobepuwup.weebly.com/uploads/1/3/1/0/131070598/sililuwikufaxot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://widusop.atwebpages.com/control_systems_engineering_6th_edition_nise.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_off0000e9c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C0 5136 bytes
SHA-256: ea8f185a3467ff03ff2f3b72af544d236b50ed9bc552f66287a10c1fbb022999
font_01_sfnt_off0000fb1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB1B 10048 bytes
SHA-256: d4dc44c74cff80d6f56e544232f528e7bb950cfef03a25f4a8a23d155cc40349

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