Malicious PDF — malware analysis report

Static analysis result for SHA-256 604f8f74a980db94…

MALICIOUS

PDF

84.9 KB Created: 2021-03-05 05:36:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: ac0737b816363651122053b483c38f42 SHA-1: b26281147cc5d42812ae615483b186257c635a63 SHA-256: 604f8f74a980db949f9e5b9c26fcb8682b1d129470ca3826aab28fe1bd3dcef9
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL leading to a suspicious domain that appears to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the presence of embedded URLs and the PDF structure suggest it's designed to redirect users to malicious content.

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 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.
  • 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://xezojetit.ru/wix?keyword=we+vibe+4+user+manual PDF link annotation
    • http://gusimaziwagax.22web.org/avatar_movie_hd_popcorn.pdfIn PDF document text
    • http://justamorem.com/48033575552a3qx0.pdfIn PDF document text
    • https://vunixumo.weebly.com/uploads/1/3/1/4/131453253/a4ded298b0a65.pdfIn PDF document text
    • https://japiravonasuv.weebly.com/uploads/1/3/4/6/134644749/2fafd3.pdfIn PDF document text
    • http://3-bureaureport.info/41646841378ilzqx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/540bf0c6-4e4a-4c8f-ad4c-aba9277f78d9/minolta_srt_102_price.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/rofovesenijabukebir.pdfIn PDF document text
    • http://latujetob.epizy.com/50765306515.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/581ba100-cbad-4968-8e72-11337f96f1bc/fios_nfl_ticket.pdfIn PDF document text
    • http://nisuzadusidu.epizy.com/dujugajaveziziwer.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/40272932160.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f693ae4a-3cd4-4011-a570-5cd5411813f1/como_pensar_mais_rapido_no_futebol.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/94768125278.pdfIn PDF document text
    • http://wijuromosumeko.rf.gd/epigenetica_metilacion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d924a26-f72d-4202-b899-24c4ba6dc2ee/25694027464.pdfIn PDF document text
    • https://s3.amazonaws.com/kegovev/86380504988.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/android_studio_flutter_sdk_path.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/66857989617.pdfIn PDF document text
    • https://s3.amazonaws.com/jupoti/23544545663.pdfIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/sedopemesezenigowosomeve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/336edca2-c6c9-4965-bbd7-0728266bc2c0/6508274870.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001036f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1036F 4824 bytes
SHA-256: 02d7baceb175e2f71a895ff2ba58b530ec746cdad44489144eae62ac4f429fe1
font_01_sfnt_off000113b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113B6 10660 bytes
SHA-256: d572528e418a0dc5c2feda70cb9d9b8152048ecd431b71764caa5833f70bbd1d
font_02_sfnt_off0001382d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1382D 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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