Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f092eedabb12f12…

MALICIOUS

PDF

81.2 KB Created: 2021-03-09 02:27:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b419c6cf9d8a74b96bee7493ac7ae8ab SHA-1: 592e8e0bbc934e0eade9695159cbb2c98df2f89c SHA-256: 9f092eedabb12f1233cc100216901f14c2f6e5c6f42732ee57833b845d5b8cb3
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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/strik?utm_term=how+do+i+install+mendeley+web+importer PDF link annotation
    • http://fedezin.scienceontheweb.net/wenad.pdfIn PDF document text
    • http://tijijosopake.22web.org/26358489130.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488314/normal_5fdd07b20a896.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381737/normal_5fd93ba387fe6.pdfIn PDF document text
    • http://zijafanovidiz.sportsontheweb.net/officejet_pro_8600_ink.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487424/normal_5ff6695af069b.pdfIn PDF document text
    • http://japancar-sib.ru/walk_above_the_clouds_esofls64.pdfIn PDF document text
    • http://xruhdfo.site/luxor_video_game_free_downloadfp3ey.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387226/normal_6037dad3b4b88.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/garmin_vivosmart_4_smart_activity_tracker_with_heart_rate_monitor_review.pdfIn PDF document text
    • http://dipenoguzel.sportsontheweb.net/31396560072.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/ad2abd27-1bce-44c7-a1ee-2bd1b6fa6256/singer_futura_xl-580_price.pdfIn PDF document text
    • http://fewetero.epizy.com/light_my_fire_piano_sheet_music.pdfIn PDF document text
    • http://xukenefurirog.epizy.com/oxford_english_dictionary_apk_full_version.pdfIn PDF document text
    • https://s3.amazonaws.com/patilawasu/xakonokukaworuj.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/abrasive_water_jet_cutting_seminar_report.pdfIn PDF document text
    • http://tifilow.onlinewebshop.net/pretty_little_liars_season_4_episode_24_watch_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5b9d891-1b9f-4ded-ae08-add49659b158/how_do_i_reset_my_pioneer_remote.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00010bcd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10BCD 23596 bytes
SHA-256: c20cca5e16243465784e092dce91d5524518d09ea868fd3a6a6e458fa2b775b3
font_00_sfnt_off0000d67e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD67E 5400 bytes
SHA-256: 516bc460d7606433437b8e1c6a417f25ef9925081a81b2d76bde70b8ba440a7c
font_01_sfnt_off0000e8d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D1 10184 bytes
SHA-256: 95c687e5569828effd72306c7f23dc391ea56f0ebb8673c9fb19be74f3fc92d8

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