Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfe9d4e0b38e8ead…

MALICIOUS

PDF

81.3 KB Created: 2021-03-31 22:00:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c868597519f37a83ac78803567b101e3 SHA-1: 7308e005b9a8952a712c2fb38450eae1e888844b SHA-256: dfe9d4e0b38e8eade06827b30507f089dd971a56aacd0e6f4fad59c2cf37a04c
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://kuzutuzo.ru/strik?utm_term=american+ways+chapter+4+summary PDF link annotation
    • https://mawegovif.weebly.com/uploads/1/3/5/3/135319367/kosizanovomove.pdfIn PDF document text
    • http://penageli.getenjoyment.net/manual_d-link_dir-605l.pdfIn PDF document text
    • https://wosefekolejareb.weebly.com/uploads/1/3/4/3/134340916/korolagavis.pdfIn PDF document text
    • https://wisutusetuma.weebly.com/uploads/1/3/4/5/134524637/medam.pdfIn PDF document text
    • https://furimubabo.weebly.com/uploads/1/3/1/8/131856330/766950.pdfIn PDF document text
    • http://dekoriribazovax.mywebcommunity.org/amulya_jeevan_823.pdfIn PDF document text
    • https://kefuluseze.weebly.com/uploads/1/3/1/3/131398598/dixapadirarif_kiwiboboxarezan_wawifeb.pdfIn PDF document text
    • http://igcopyrightverify.com/how_to_write_a_story_on_wattpad_without_the_app5kd7c.pdfIn PDF document text
    • http://tetekegobuj.iblogger.org/misutulasawewarem.pdfIn PDF document text
    • https://niromovikusuzu.weebly.com/uploads/1/3/4/6/134651616/kalumezorojoj.pdfIn PDF document text
    • https://remezovegaz.weebly.com/uploads/1/3/1/4/131406605/436f66a5915.pdfIn PDF document text
    • http://sochi2026.com/hampton_bay_ceiling_fan_replacement_glassbk5g3.pdfIn PDF document text
    • https://fojokelimavame.weebly.com/uploads/1/3/4/7/134713907/wurevopamasiza_xobogoto.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wojobawezelo.rf.gd/bridal_march_piano_sheet_music.pdfIn PDF document text
    • http://fiwimul.epizy.com/sazaneposukanijor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43043bc9-1642-4cb0-8c58-8892c8286478/dell_latitude_e6430_battery_price_in_bangladesh.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f9c3c05-2638-4dc9-80f3-5e6dd4504c39/cnn_update_on_presidential_election_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51f266d7-1140-41fb-86a6-2ef29af4f2fa/48371265439.pdfIn PDF document text
    • http://vupaguriwedizid.atwebpages.com/suzorifikazaza.pdfIn PDF document text
    • http://jifimurosesapu.atwebpages.com/anabasis_xenophon.pdfIn PDF document text
    • http://fakotimu.rf.gd/memik.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_off000101b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B8 5412 bytes
SHA-256: dd19fce9d07d84a7d98ae7fe351b57b498573ee1832bf1940ece6ef644f2f2c6
font_01_sfnt_off00011412.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11412 10684 bytes
SHA-256: 75d6486d4a4c228df10687d79bed8c918c0b44db69e0f156aef586f6e67f49e5

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