Malicious PDF — malware analysis report

Static analysis result for SHA-256 33a7e29b01e67b61…

MALICIOUS

PDF

72.2 KB Created: 2021-02-11 20:52:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: f8b0f88c81f159a15354e3a1dde5b721 SHA-1: bc69d22c4381bbe0df08439e93217acc68951816 SHA-256: 33a7e29b01e67b61f0cfcf8aef5477c5c191ce4d7e3debaa2e44cee4eec51353
196 Risk Score

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://leonvi.ru/wb?keyword=freelancer%20php%20exam%20answers%202019 PDF link annotation
    • https://bilagezapa.weebly.com/uploads/1/3/1/1/131163658/patusizofexeb_lafujew_giretew_dojibikuvufof.pdfIn PDF document text
    • https://revunisukigi.weebly.com/uploads/1/3/4/8/134849871/renufuzinapi_falisujekutoved.pdfIn PDF document text
    • https://lepopitiw.weebly.com/uploads/1/3/4/7/134762721/1350816.pdfIn PDF document text
    • https://dilasakezonaxos.weebly.com/uploads/1/3/0/7/130775260/damojanatebe-xelukivom-borozisupenesev-gowovufeniveg.pdfIn PDF document text
    • https://wimiberurazem.weebly.com/uploads/1/3/4/3/134351881/4bc2d.pdfIn PDF document text
    • https://rulotukipaka.weebly.com/uploads/1/3/0/7/130776525/1766599.pdfIn PDF document text
    • https://safamitiwifiro.weebly.com/uploads/1/3/0/7/130739579/c7e774.pdfIn PDF document text
    • https://banatili.weebly.com/uploads/1/3/5/3/135314160/7251465.pdfIn PDF document text
    • http://chambrely.xyz/audio_amplifier_circuit_diagram_usinmrtol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/kesolowuroridodoka.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/mazujujavuvitubanep.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/97302554951.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/80216030690.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/jalakuriwadudaninedive.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/chemistry_11-_3_practice_problems_answers.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_off0000d97e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD97E 5772 bytes
SHA-256: 9b9e3cd69fa40297e2fa0c5a1a753bd93c8b7ecd42234889d5badab9f513a56b
font_01_sfnt_off0000ed15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED15 11456 bytes
SHA-256: 7b6626d9d8bcd9acca9bfead4d05178b2bb694974cffb87aab30a8c14add3315

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