Malicious PDF — malware analysis report

Static analysis result for SHA-256 021917c9d50f320c…

MALICIOUS

PDF

73.5 KB Created: 2021-03-08 04:49:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 8dafe1e9e3beb5481e0a97e971f79b0b SHA-1: 9425be9a515d299d04bed192904bb8228264f2b9 SHA-256: 021917c9d50f320c29d08416eefcda82b0413e64d158d3aa4f5209a6d0af379c
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 as a link farm, suggesting a phishing or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically classified as a phishing trojan. While no scripts were directly extracted, the PDF structure and numerous external URLs point towards an attempt to redirect users to potentially malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://botokaw.ru/aws?utm_term=never+fade+away+lyrics+samurai+meaning PDF link annotation
    • https://cdn.sqhk.co/zimopaji/hfgjyYW/best_manual_car_driving_games_for_android.pdfIn PDF document text
    • https://bewanabexujafo.weebly.com/uploads/1/3/6/0/136050633/galezuxagoduz.pdfIn PDF document text
    • https://jafipununevov.weebly.com/uploads/1/3/0/8/130814040/vewewovuwujagudobav.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwifoviwalo/iDhfhia/kunexuwijesapubov.pdfIn PDF document text
    • https://cdn.sqhk.co/duvetezoje/hjbgiie/vilulamasagevumo.pdfIn PDF document text
    • https://cdn.sqhk.co/guzowozuk/gd2idm2/pebogeji.pdfIn PDF document text
    • https://joziwofu.weebly.com/uploads/1/3/4/0/134012586/zijow-kumunizepet.pdfIn PDF document text
    • https://gulurevipad.weebly.com/uploads/1/3/5/3/135349864/69f1b71fc49390.pdfIn PDF document text
    • http://tozidak.mygamesonline.org/51970333992.pdfIn PDF document text
    • http://banademebilite.sportsontheweb.net/finding_volume_of_prisms_and_cylinders.pdfIn PDF document text
    • https://badosajag.weebly.com/uploads/1/3/1/4/131407507/4466739.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/paropabaru/50160949696.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/gepuwosabumojuzoruvaba.pdfIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/subject_verb_agreement_worksheet_with_answers_for_grade_6.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/wxpython_migration_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/boniato_asado_informacion_nutricional.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/hp_officejet_6500_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/wonirerifabuwubiwovuneful.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_off0000d7d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D8 5564 bytes
SHA-256: 594fcb32da718aabd0a5ab59c2fff913c3d65b336d2ac73ecea98a0c6e5c36cb
font_01_sfnt_off0000ead6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD6 13996 bytes
SHA-256: ebb521e04682e08eca89dc85651472b9136c767fdb043014162b7ec789267c9e

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