Malicious PDF — malware analysis report

Static analysis result for SHA-256 20dff6aa22f2d33a…

MALICIOUS

PDF

79.9 KB Created: 2021-03-19 19:06:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: d455db97ab1b9c3028b570b925f71bb5 SHA-1: 2029b67971f271e4cf8e7423c34e275f31ed1466 SHA-256: 20dff6aa22f2d33a34a8b7c6b243a89a6f703262c441399abbe14381943be8fd
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicative of a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to phishing sites or download further malware. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with a malicious document designed to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://lozipotod.ru/wix?keyword=dream+car+racing+unblocked PDF link annotation
    • http://pekibexuvipeve.scienceontheweb.net/conformational_isomerism_in_n_butane.pdfIn PDF document text
    • http://cardio-natural.info/how_to_do_a_christmas_advent_calendariywek.pdfIn PDF document text
    • http://nosilekexiwot.mywebcommunity.org/kojakemajonoruvuna.pdfIn PDF document text
    • https://cdn.sqhk.co/rapaxino/FjLiehd/xenoblade_2_kora_heart_to_heart.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366369/normal_603d40f697716.pdfIn PDF document text
    • https://cdn.sqhk.co/kawurefeki/Ziahjxu/stick_fight_2_mod_apk_android_1.pdfIn PDF document text
    • http://politach.com/does_apple_cider_vinegar_help_you_lose_weight_fast30qbq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405185/normal_5fcbfa2f465b5.pdfIn PDF document text
    • https://cdn.sqhk.co/zogugumo/bjhorUM/download_game_fruit_ninja_mod_apk_android_1.pdfIn PDF document text
    • http://lizowaw.scienceontheweb.net/how_many_sentences_is_a_brief_paragraph.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxuvedije/zJjghhc/las_vegas_official_visitors_guide_2020.pdfIn PDF document text
    • http://dafagaketa.sportsontheweb.net/metal_gear_solid_1_ps3_controls.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475737/normal_5fdd97449bd47.pdfIn PDF document text
    • http://experiment.website/416769172a587b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368226/normal_6004ae7d54a19.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388611/normal_600577dd1e5f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366406/normal_6046214c659fa.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/CsqibHb/duzibadufefubonatamarukez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416302/normal_603eb4768b18f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387704/normal_601a583dddf10.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e72deea9-3c4d-48de-8429-d2e8e2d5d9b3.filesusr.com/ugd/68b2df_5b33b370dff84f0a930577880dcf31a8.pdf?index=trueIn PDF document text
    • https://9e730ba1-499c-413e-9a09-8a81f8121270.filesusr.com/ugd/0a0016_0111090800294f0391fb8816c7ff8bc5.pdf?index=trueIn PDF document text
    • https://80b2a579-f9ed-4aa0-b91a-ac3c8973c086.filesusr.com/ugd/353d00_188874301a024a07873c7f44a2c70a1d.pdf?index=trueIn PDF document text
    • http://sifebitufol.onlinewebshop.net/98153228696.pdfIn PDF document text
    • https://f238abdf-92e3-4651-90df-65b6e8a648d9.filesusr.com/ugd/99965f_13ba354107e840e8bdbef16373dcf137.pdf?index=trueIn PDF document text
    • https://48bf584d-d56c-45cf-b4f3-c1c05dce5274.filesusr.com/ugd/3f4b99_2e5d87eec2664998ac41125e47c36619.pdf?index=trueIn 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_off0000fcf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF8 5284 bytes
SHA-256: 00602c98accfd1fc00274abd6475d42b8410b95a50b54566cf4a02dd88b3f743
font_01_sfnt_off00010edb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EDB 10324 bytes
SHA-256: f2553b7e33345ffb29e241fff39fb21dd2f64275fed67745d079de212aef46ad