Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbd353133420be61…

MALICIOUS

PDF

77.4 KB Created: 2021-01-15 06:37:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 75b95621b54e9872fafafd9b0102d141 SHA-1: 07ab8a2f483fe9455bf0bfc89bfb5888296845f3 SHA-256: bbd353133420be61aafdf46a6cb6e866c647bd366e430ea1a0d24f780c6f0d6a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of embedded external links, a common tactic for link farming and phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and numerous external URIs suggest it is designed to redirect users to malicious content, likely for credential harvesting or malware distribution.

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://trafffe.ru/aws?utm_term=chinese+journal+of+physics+latex+template PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465396/normal_5fc2dbc145113.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502563/normal_5fdbfbc516b47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374852/normal_5fbbf683b8771.pdfIn PDF document text
    • https://gofasajuv.weebly.com/uploads/1/3/4/3/134359632/rotowef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449771/normal_5ff7575e44831.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://s3.amazonaws.com/rikolesafuwofar/bikoxirivilalepur.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/lonemolabawinogujuloz.pdfIn PDF document text
    • https://s3.amazonaws.com/toniseligiwuzux/advanced_scientific_calculator_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/samenaxobolajesifule.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/51503287583.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/10807627623.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezodepugov/ase_regurgitation_guidelines_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/epiales_greek_mythology.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD539 3648 bytes
SHA-256: 4632a24b30838a4c9e9b6b813de9df210c09723e0d9349e9473eafb4f2d0106b
font_01_sfnt_off0000e22f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE22F 5404 bytes
SHA-256: 43c3d19bcc568cbd45e8809c82b007a15ba93ce2b368caa8a2fe0f914a94ff88
font_02_sfnt_off0000f476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF476 11148 bytes
SHA-256: 70bdf7b2bb60a491088318800053b627690b36d1440b3f37574f87001d752bd9
font_03_sfnt_off00011a0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A0D 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

Open this report in the interactive analyzer, or submit your own file for analysis.