Malicious PDF — malware analysis report

Static analysis result for SHA-256 c97f5c97f3212ed0…

MALICIOUS

PDF

74.1 KB Created: 2021-01-08 16:02:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 19a70abf8d65b5d9e7ad2c1b3a2432ec SHA-1: 7a3367d130401b33ef123290cce13ebf77ef3e53 SHA-256: c97f5c97f3212ed08d5815a98c98092a6be76b149cb5b97d8134720ea865c427
156 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a malicious phishing document, including a link farm and ML classification. The embedded URL 'https://traffnew.ru/aws?utm_term=printable+7th+birthday+invitation+templates+for+boy' suggests a lure related to printable invitations. ClamAV detection further confirms its malicious nature, identifying it as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffnew.ru/aws?utm_term=printable+7th+birthday+invitation+templates+for+boy PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413462/normal_5fa3db5dce077.pdfIn PDF document text
    • https://mazesuxuraname.weebly.com/uploads/1/3/4/3/134373945/3195035.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372100/normal_5fbedd08ef6e6.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/vogubivajavofu/89401394292.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/86632496613.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a6a8502-642c-4b24-942e-c7e97a7671b6/dewozesurajisavogo.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/gul_ahmed_textile_mills_ltd_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/majuwozoguvijajenalikot.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/assam_university_result_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/backup_android_contacts_to_pc_broken_screen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6faa9b2b-db0e-4afd-b5c3-2d1ca99eb103/real_grand_piano_for_sale_new.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/midlife_crisis_band_nj.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/13561441251.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_off0000e320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE320 5664 bytes
SHA-256: edae61e265ac1b84fc362004c81571dd7df7125348d1abf80d12c5f76b5ebffc
font_01_sfnt_off0000f642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF642 10740 bytes
SHA-256: 79a176c923fbfe5725eddb4c9b8d934ec00569e1ff8d8a30ca8156dfe7427be6

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