Malicious PDF — malware analysis report

Static analysis result for SHA-256 e35c7adb7833de80…

MALICIOUS

PDF

167.9 KB Created: 2021-03-27 22:27:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fac3d2e3a6db021e7a8a2d3bbd59176c SHA-1: 7caa30bae7b00a0e34e0b8f7d7662cab753ae169 SHA-256: e35c7adb7833de808ef79ad523f520aa3fa5b9a8bb4f6fac46194f61c4576837
224 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of an advance-fee scam, using lures related to lotteries or parcel deliveries to entice users. It contains numerous links, with at least one pointing to known malicious redirector infrastructure at 'https://yafferge.ru/wix?keyword=mesut%252B+c3+96zil'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://yafferge.ru/wix?keyword=mesut%252B+c3+96zil
    • http://baramijotafexo.mypressonline.com/built_2_last_construction_cleveland.pdf
    • https://cdn-cms.f-static.net/uploads/4387806/normal_60519ecf4b407.pdf
    • https://static.s123-cdn-static.com/uploads/4450251/normal_6000a163166ee.pdf
    • https://cdn.sqhk.co/zujubokave/cIM8T21/aplikasi_no_crop_video_instagram.pdf
    • https://cdn-cms.f-static.net/uploads/4445742/normal_6048faf05e927.pdf
    • https://cdn-cms.f-static.net/uploads/4367914/normal_6059e8431eb55.pdf
    • http://xinuvaro.sportsontheweb.net/88033968200.pdf
    • https://cdn.sqhk.co/luwukamuku/nBjcjhL/okcupid_search_by_city.pdf
    • https://cdn.sqhk.co/rasadenibe/Iichjid/use_armor_stand_minecraft_pe.pdf
    • https://cdn.sqhk.co/xuwifoviwalo/ejagcJ4/mod_pizza_coupon.pdf
    • https://cdn.sqhk.co/torujazelome/hjAigzH/retro_11_low_snakeskin_blue.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://2ddedb0e-b7b0-41c9-a8bc-c018bd0e6e4c.filesusr.com/ugd/70094d_62b35e939f9b4b8484f70d0f403bbded.pdf?index=true
    • https://02ee9779-94d6-4ec7-959f-c0f99fe19a35.filesusr.com/ugd/cdc607_341a2a5c8e42497b9d3fe8769b5c3b28.pdf?index=true
    • http://dajomilot.atwebpages.com/nixiximazazotonulufaz.pdf
    • http://zutugidod.onlinewebshop.net/how_fast_is_a_2020_kawasaki_mule.pdf
    • https://s3.amazonaws.com/pilazi/zewajawo.pdf
    • https://02bc4616-4eae-4b38-b2c9-0e654f754ee0.filesusr.com/ugd/069df5_57ce98cc94274ff582bdc860305cd5e3.pdf?index=true
    • https://504706c9-3a86-45eb-876a-6494ef133fff.filesusr.com/ugd/80c1db_abba543361c14eb1ad47755f280bdbe5.pdf?index=true
    • http://wukevivetarapu.myartsonline.com/il_neoclassicismo_nell_arte_del_settecento_pinelli.pdf
    • https://d102a0f2-001f-4998-bb0a-88ac30ac05b5.filesusr.com/ugd/771ea4_2b261efc27f9475c8b614ef0f23bf080.pdf?index=true
    • https://s3.amazonaws.com/kaxukok/intouchables_sheet_music_piano.pdf
    • https://s3.amazonaws.com/rogugagatuf/32000626308.pdf
    • https://s3.amazonaws.com/nolarifaforuxop/crown_preschool_worksheet.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024124.bin
58ce3d3b7a5ea244743caa491dccac1ba8059e2a4e2ae146ea4c743827ddcf81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24124 5016 bytes
font_01_sfnt_off00025250.bin
5ee34ff7e3a23f71ed8abc1a585d08281dc6a5616737812ce1c242cf8670d48b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25250 4812 bytes
font_02_sfnt_off00025f42.bin
dab88da974e578a4b8f8eb803018eee8e406d5d5edd032832f11573715da7b2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25F42 16880 bytes

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