Malicious PDF — malware analysis report

Static analysis result for SHA-256 d884e3323fa5b354…

MALICIOUS

PDF

85.8 KB Created: 2021-04-01 19:28:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ec5921ca3b1094a75d961bf207ff9771 SHA-1: f1ae21c312dbed671fb2a2252e3ba1528391afab SHA-256: d884e3323fa5b3542055a6bd134902af952827d04ca77f0d82f260fc9674bc74
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 0.9997

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://maypoin.ru/strik?utm_term=diccionario+espa%25C3%25B1ol+pdf+2019 PDF link annotation
    • http://instapodarok365.site/31024818074fdu07.pdfIn PDF document text
    • http://sebevifa.getenjoyment.net/arariba_plus_matematica_8_ano.pdfIn PDF document text
    • https://cdn.sqhk.co/nemazuwigumo/hBghX5g/month_calendar_2019_calculator.pdfIn PDF document text
    • http://winewelimefavo.iblogger.org/peximivetunisiterolob.pdfIn PDF document text
    • https://cdn.sqhk.co/livatunozasu/jfa7hiJ/elves_vs_dwarves_lotr.pdfIn PDF document text
    • http://idealica-italiaoficial.site/7006471305169jdv.pdfIn PDF document text
    • http://topcabinets.xyz/catholic_prayers_of_the_faithful_for_all_souls_dayoozum.pdfIn PDF document text
    • http://nakrutkavk.site/10_easy_guitar_songs_without_chords9jy05.pdfIn PDF document text
    • https://cdn.sqhk.co/rufopunuk/gfLgdbb/bmx_racing_bike_shop_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/samumosoxivi/Fje7hbp/.pdfIn PDF document text
    • https://cdn.sqhk.co/wogokodu/dhQXxom/senowatimavazokomo.pdfIn PDF document text
    • http://bivozebavi.iblogger.org/97371330511.pdfIn PDF document text
    • http://all-system7.club/performance_review_comments_for_job_knowledgecmwy8.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/d6776aa4-ba6e-45c0-a883-bfcaf6ee8b33/advanced_dungeons_and_dragons_2nd_edition_players_handbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3531aed3-9a58-4de0-9540-5bb1314bfd8c/how_much_to_build_an_indoor_soccer_field.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f5e91ca-f464-4975-83ae-c2836b0d6d5f/39726711113.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dde614f-5e48-4ec2-89dc-1a1b5b3f8421/xodamupepefami.pdfIn PDF document text
    • http://sutalinilemu.rf.gd/amsterdam_walking_tour_map.pdfIn PDF document text
    • http://kewivifonawati.epizy.com/40538897066.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3bd7fc5-6e59-4e0a-a1a8-079695a89c1c/telestar_by_meade_model_ds-114.pdfIn PDF document text
    • http://kedisijusa.onlinewebshop.net/31169609239.pdfIn PDF document text
    • http://tirevotijo.epizy.com/pufosajab.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001049b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049B 5840 bytes
SHA-256: 8375a5666ae3192e425c61b86d09cf747c00558ac5bdf913f17b41477a10ae7c
font_01_sfnt_off00011855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11855 15564 bytes
SHA-256: b4acec4cdd9d5ffecf7d7c8cb9595d12f971be4cd5d940309fb8ebb794111855

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