Malicious PDF — malware analysis report

Static analysis result for SHA-256 f007b2cbdfda3fe0…

MALICIOUS

PDF

85.1 KB Created: 2021-05-06 10:17:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: dca1f7d9df38748110807e455bff5d1a SHA-1: b9aeba2195f3b50c2384e17deff61edc3a35fc88 SHA-256: f007b2cbdfda3fe09c0083f3859c2525101291b126de55e480afe1460c62351c
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristics point towards malicious content designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/strik?utm_term=trx+training+exercises PDF link annotation
    • http://wewidarusen.iblogger.org/agenda_21_free_download.pdfIn PDF document text
    • http://vumoramoguko.22web.org/morovobijogotizetekuke.pdfIn PDF document text
    • https://rupimobo.weebly.com/uploads/1/3/4/8/134891389/5956903.pdfIn PDF document text
    • http://pawosevisipe.iblogger.org/98944845605.pdfIn PDF document text
    • https://zusikoxapumobib.weebly.com/uploads/1/3/4/7/134766975/birojelil_duwede_gezikuluwer_vepol.pdfIn PDF document text
    • https://garusase.weebly.com/uploads/1/3/4/6/134634063/45c8d4f4827361.pdfIn PDF document text
    • http://porupofimumole.22web.org/how_to_read_and_understand_the_bible_effectively.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
    • http://jinuritubamo.rf.gd/7288726312.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/bio_data_format_free.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/descargar_adelantos_panama_apk.pdfIn PDF document text
    • http://gotuwuvuxe.rf.gd/daludonedifexamutavupinel.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/zidal.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/28765309902.pdfIn PDF document text
    • http://paruwegugu.rf.gd/36360077636.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/wobopefixopow.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/nuvotoxe.pdfIn PDF document text
    • https://s3.amazonaws.com/wanalovum/99956606431.pdfIn PDF document text
    • http://nozepixi.rf.gd/83116724363.pdfIn PDF document text
    • http://davirokonal.epizy.com/12th_agriculture_book_download.pdfIn PDF document text
    • http://nodibuxirojijok.epizy.com/how_to_adjust_snugride_snuglock_35.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_off000102a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A5 4628 bytes
SHA-256: 7b313a1fada86afd34c81a495df4eca2c0977a28ef6b5868f512bfb7557f425c
font_01_sfnt_off00011260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11260 10940 bytes
SHA-256: 0c0b7e56f11444d8a2fec4ae043874f642b540a149a79650acdf9b6713f753c7
font_02_sfnt_off000137c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137C2 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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