Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3d704d898cb27ff…

MALICIOUS

PDF

77.8 KB Created: 2021-04-12 09:30:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 656d6690558ef375e3c1485a8ba16507 SHA-1: 5117d83d6fb4cfaafc07ccf7e5ec441899c57307 SHA-256: f3d704d898cb27ff3a1c6a0a59dbe40b1158ae312cb4bad13bf26c609732ac18
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 https://midufefew.ru/strik?utm_term=how+to+solve+calculus+problems PDF link annotation
    • https://cdn.sqhk.co/muligumixe/LhihiaZ/hideous_creature_synonym.pdfIn PDF document text
    • http://gtmedis.com/zagifapofivezowejumudutlsjfd.pdfIn PDF document text
    • http://summ-green.fun/samsung_rf268abrs_ice_maker_not_workingvryln.pdfIn PDF document text
    • http://zugugalepew.mypressonline.com/60751304459.pdfIn PDF document text
    • https://cdn.sqhk.co/ranemagesoga/hbzLfhg/madogapedixofafaxavukut.pdfIn PDF document text
    • https://cdn.sqhk.co/texirova/igP8cio/afc_solar_squad_space_attack_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421330/normal_6023d237a0250.pdfIn PDF document text
    • https://cdn.sqhk.co/nefikelifu/gfhaogf/bowling_speed_check_machine_price.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446502/normal_5fcdc0c8d938d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426828/normal_605308bd1a17d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426066/normal_5ff3c66cbe69c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450898/normal_60571b6e1ae48.pdfIn PDF document text
    • https://cdn.sqhk.co/vukupamita/HkghRgc/zombie_defence_2_episode_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b696efc-a9bc-4f94-b86e-fe99d678909e/can_i_get_my_ct_real_estate_license_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a507852d-89b4-474d-a024-c820001cafcc/95230391684.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/sikimikiguvo.pdfIn PDF document text
    • http://gitojaxekeveki.onlinewebshop.net/apc_smart_ups_750_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a52807d-f999-4849-992c-f0acf9bad558/fokeg.pdfIn PDF document text
    • http://vejegaba.atwebpages.com/tagumonibos.pdfIn PDF document text
    • http://naxepedawizozet.onlinewebshop.net/lepuw.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/apa_format_appendix_and_figures.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/mammogram_report_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/laginekux/los_angeles_metro_map_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed6e3a58-2fc1-48f6-b815-b431a8dc5018/99994722492.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_off0000f110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF110 5332 bytes
SHA-256: 288b3427e949c04042246a3d6adb91ffc7f69cdccd57a543f3a733a8b9b05d79
font_01_sfnt_off00010332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10332 11240 bytes
SHA-256: eadc84ba0d9d87cc8e0b3fb8735aee744b8082de8757601fb1a05f5553aaeba9

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