Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3f7798eeb3ce6a5…

MALICIOUS

PDF

76.4 KB Created: 2021-02-26 15:05:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: f9ca4b26a2e15eedc0b2e3556cfde334 SHA-1: 6d9eda33d52873939c5da2c39e3c1b12093baa12 SHA-256: f3f7798eeb3ce6a5b0e9b9366cc32e581786e54d54de0bb3e2244b13857e1df0
126 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, with the primary one being a link farm designed to redirect users to potentially malicious content, disguised as a "Tableau resume template". The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to obscure the true destination by using many disposable domains. No scripts were extracted from this sample, but the embedded URLs and link farm structure strongly suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/wix?keyword=tableau+resume+template PDF link annotation
    • http://tifusavegapawuf.mygamesonline.org/85611534800.pdfIn PDF document text
    • https://lofokuvowuvi.weebly.com/uploads/1/3/4/3/134362742/7815054.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417526/normal_600a496549979.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468550/normal_601d286476b30.pdfIn PDF document text
    • https://wunawewob.weebly.com/uploads/1/3/0/7/130775592/6010d071d397819.pdfIn PDF document text
    • http://copyright-help-center.com/easy_way_to_draw_cartoon_characters54dr0.pdfIn PDF document text
    • http://armada.technology/fcr_carb_tuning_guide0e8t9.pdfIn PDF document text
    • https://pupupobinizoto.weebly.com/uploads/1/3/1/3/131384436/xiwesem_topabekag_vilokadafa_rurozivupereni.pdfIn PDF document text
    • http://help-verifiedbadgecenter.com/vogarivakonuz798ak.pdfIn PDF document text
    • https://namosupegu.weebly.com/uploads/1/3/4/3/134313644/1617025.pdfIn PDF document text
    • https://penixosifa.weebly.com/uploads/1/3/1/4/131482878/mabazigomipuxutet.pdfIn PDF document text
    • http://pofuxubilet.sportsontheweb.net/16.1_our_dynamic_climate_key_concepts_answers.pdfIn PDF document text
    • http://bu-markett.com/stack_color_apk_uptodown239fc.pdfIn PDF document text
    • http://zisuroto.mygamesonline.org/luvaneriluvasemesonabusox.pdfIn PDF document text
    • http://zegererevez.medianewsonline.com/21564537321.pdfIn PDF document text
    • http://lozipazom.sportsontheweb.net/how_to_set_time_on_g_shock_protection_watch_5081.pdfIn PDF document text
    • http://tulomodev.getenjoyment.net/60010460743.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zulezov/jurinudirus.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/pafakisodasanolud.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/genaturifetesivifu.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/avatar_aang_sub_indo_lengkap.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_off0000ef35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF35 5052 bytes
SHA-256: 79695b14f11487103b8bd4177c95b35d64d1f2abb49c91c8e2d4bc7b46a3b7b1
font_01_sfnt_off00010046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10046 10660 bytes
SHA-256: c967fb8a52affb7696d59e7fb0d2d3f0eb2c276bf993d27f7432331a4784fece

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