Malicious PDF — malware analysis report

Static analysis result for SHA-256 7497afb4b516cc02…

MALICIOUS

PDF

80.6 KB Created: 2021-05-11 00:28:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9d8d01a7524ce6668fe292f9e879f11c SHA-1: 53d5d6ff6739aae0fdd3a16295c4fda4462287ca SHA-256: 7497afb4b516cc02f8171949b2ff0885687d3a4a416bf4f38bea9f1aa0cb6ddb
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 0.9996

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://dafemum.ru/strik?utm_term=how+to+tie+a+blood+knot+for+fishing PDF link annotation
    • http://hookup153.online/94893201073g26lm.pdfIn PDF document text
    • http://budonap.iblogger.org/kirolanuwukamenot.pdfIn PDF document text
    • http://cooldomen.space/boruvibezoderodoj71jt.pdfIn PDF document text
    • http://pepariravifaza.getenjoyment.net/2020_buick_century_repair_manual.pdfIn PDF document text
    • http://milanbeachs.space/xakebemaxewi4jwu9.pdfIn PDF document text
    • http://jonebukusopovet.mygamesonline.org/facial_nerve_palsy.pdfIn PDF document text
    • http://jaxifas.getenjoyment.net/pesafegunawelosukozo.pdfIn PDF document text
    • http://hdvideo.design/zovobikipuwurejewekurasijnbkzv.pdfIn PDF document text
    • http://rankingcoach-seo.com/champion_generator_home_depotvae7d.pdfIn PDF document text
    • http://dekiweragaf.mywebcommunity.org/grammar_and_punctuation_practice.pdfIn PDF document text
    • http://xalebiru.iblogger.org/coach_quilted_shirt_jacket.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zezajezo.epizy.com/40094513460.pdfIn PDF document text
    • http://kabemetuva.rf.gd/taber.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d63d2ee2-ccba-498f-b7ac-96c2bbb62833/44311791144.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d437350-16cc-4f0f-a3c4-1022854ae268/wolves_of_the_calla_andy.pdfIn PDF document text
    • http://lagazirixul.rf.gd/muscles_of_anterior_abdominal_wall.pdfIn PDF document text
    • http://bunopudo.rf.gd/33683234743.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b86f0fe1-de5d-4db2-a01f-3e5e56dc705b/96924761418.pdfIn PDF document text
    • http://gajuxobap.rf.gd/d_d_adventurers_league_character_logsheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b71ce0b-d637-4b27-a73f-1e90e2187555/bojopilakatepadu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa68a89c-5f0a-4b19-bb07-2fe991aedcb6/40870562144.pdfIn PDF document text
    • http://sabozovitebem.rf.gd/44023206697.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_off0000f9cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CB 5424 bytes
SHA-256: 103145e125831a08eed73ce5450e04a142a4c8840e33da283b7a725d7eb3e509
font_01_sfnt_off00010c46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C46 11444 bytes
SHA-256: 21707a32cd601f383fe09dbb790cac803ee2d029be5e845db18bd54eafb118ed

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