Malicious PDF — malware analysis report

Static analysis result for SHA-256 dddc900ed6343c2f…

MALICIOUS

PDF

85.1 KB Created: 2020-12-01 11:53:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 5570f374c689cfe985ee83b896ea5802 SHA-1: ed88e93d97436ade8821cbb97c8292d50ba32ee8 SHA-256: dddc900ed6343c2f6e87c506c932f42ab638d8e235e546b3e2cab61885dd81d6
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing attempt. It contains a mass of external links, with one primary malicious URL identified. The document body, though heavily obfuscated, appears to be a lure related to a training program, directing users to the suspicious domain.

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://traffnew.ru/123?utm_term=the+developers+of+a+training+program+designed PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384296/normal_5fbfa1ef88cc7.pdfIn PDF document text
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/bagifesanoni-xirosowanaka-gedivolasolite-xitakatefo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445564/normal_5fc5fa24a76e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502698/normal_5fac15e6a01e6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc2a825a13a450babff6b59/t/5fc5b3704e98326c02d65daf/1606792048454/35136033419.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5a1af81c9a2a0c9954b6/1606375963049/coker_college_webadvisor.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc50c4ebe9b693951258028/t/5fc57063e6d49a06bb4b5a79/1606774883280/gravel_driveway_repair_indianapolis.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f975bf71053ccb109642/t/5fc32caa4f98375720476e8b/1606626475936/letter_to_parents_from_teacher_end_of_year.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21a82016-6b11-4ba4-abe3-a4b1e32a3a57/grand_rapids_weather_radar_noaa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33726be7-067e-4709-b950-1f34687a614e/55310002055.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e1846b97992eb55bfc03/t/5fc2db99cb3e0f5771aec4e5/1606605721456/fafotufiboxobaja.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1a765405d5340f32ee4e2/t/5fc453fc5147b14804bce1ca/1606702076718/melisefuledawubinodajevav.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_off00010e84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E84 5464 bytes
SHA-256: 23d3c56a2a5e8bb324c78e373b7b7754c0f5d9e9e7c8eb1cd495a0c05649ee2c
font_01_sfnt_off000120f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120F8 11316 bytes
SHA-256: b64d046c41b182a6c52949c682e19d841730b7e299cb038c1ca76193bacc03c2

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