Malicious PDF — malware analysis report

Static analysis result for SHA-256 b00bc1483c90d381…

MALICIOUS

PDF

67.0 KB Created: 2020-12-15 12:42:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2795ccea1ec2dd6934c4a9f4908901b7 SHA-1: 487a49d2cbd514308f6b80c9e4b78d5f1336d511 SHA-256: b00bc1483c90d381390ebcea864488808eadeae7ad42aa1c7aebbf90b004af93
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL pointing to a game download, suggesting a phishing or malware distribution lure. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the PDF structure and heuristic firings point towards a malicious document designed to trick users into downloading potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/123?utm_term=gta+5+download+apk+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4455405/normal_5fa886386367e.pdfIn PDF document text
    • https://kinojapi.weebly.com/uploads/1/3/2/3/132302846/660448.pdfIn PDF document text
    • https://pazijovipa.weebly.com/uploads/1/3/4/3/134327002/4216077.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374374/normal_5fa2c68fc2c1d.pdfIn PDF document text
    • https://pevaluxuduta.weebly.com/uploads/1/3/4/5/134502983/1095998.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/baposivarabuj/tuparenavuviberaguzunafi.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/34097122168.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22b487eb-9b75-4519-b816-7b810ad6d00a/lokobudanetotirotazabof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d632777-76e1-4340-8654-aa78ef909e42/92500785891.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/jotiwisopakugabatap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/925659b2-232c-42f3-b96a-3ecf1d838c51/gardencrest_apartments_waltham_ma_re.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6c54df7-5ebf-4d5e-bc83-553286962836/how_to_frame_a_window_in_a_wall.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c151dfad-52fe-4be5-ab12-637b854b80ab/ntfs_undelete_key_generator.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_off0000c8c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8C9 5168 bytes
SHA-256: a6b11e1e767e7c37fb2774fe32df2aa6711116def75c2deed3f8f4ff5166c2e9
font_01_sfnt_off0000da92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA92 10804 bytes
SHA-256: 199f693b304e1d923ca0bcf26c5189b85d1b10848c05125dd059e0e9e69b3cd9

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