Malicious PDF — malware analysis report

Static analysis result for SHA-256 47ef044393b0ee0f…

MALICIOUS

PDF

70.4 KB Created: 2021-01-03 00:34:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: e49298a19d871339bf38bf9bf4d59176 SHA-1: 7444ab984e30dda02f9f1bd934c6083d8f7c0730 SHA-256: 47ef044393b0ee0f1f2400a56f41382179df5dfd3dd7ecf54c39fdba3e1f7db6
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URI pointing to 'trafffi.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and 'function notation calculator soup', suggesting a lure to a malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffi.ru/123?utm_term=function+notation+calculator+soup PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4495994/normal_5fdae2d224e94.pdfIn PDF document text
    • https://mokekisinuru.weebly.com/uploads/1/3/4/3/134366850/mugatadolopopeve.pdfIn PDF document text
    • https://virenogapugutu.weebly.com/uploads/1/3/4/6/134635416/fbc02f761d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404296/normal_5fa347cb2ddeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375522/normal_5fb67e1d192ae.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a40a1925-d1dd-43e9-8af6-110b1df1454f/jetafufibawalovefudijiw.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/college_algebra_practice_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4a00182-a482-4476-84a0-1b5514a2c1c3/ethiopian_airlines_cargo_fire_shanghai.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/beavis_and_butt-head_do_america_tom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/115d92f2-47d2-4088-91bd-e983e899f0f6/fantastic_beasts_the_crimes_of_grindelwald_stream.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/2005_yamaha_f200_service_manual_free.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_off0000d173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD173 4884 bytes
SHA-256: 4e44d37e91f2e8063214b55fcc0682eb52076eeeda9159232d2ecee4a9b9bf8c
font_01_sfnt_off0000e220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE220 12232 bytes
SHA-256: 5a016c8447ae3c6987d884c1ca63373f70f7aaaeb0538645a6a056d2c351a421