Malicious PDF — malware analysis report

Static analysis result for SHA-256 d35d69b00964f344…

MALICIOUS

PDF

71.6 KB Created: 2020-11-20 08:44:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 1d747a6d41ce9bdb384a4d8f2178ac0b SHA-1: 2cdfdb461ef5edd558a973f67d7cd880090f87de SHA-256: d35d69b00964f3443a909e2fb2bcb9e77d278a54bbb9b862af225398ee924fde
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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 high likelihood of malicious intent. It contains an embedded URL pointing to 'trafffi.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to 'Hubspot social media certification answers quizlet', aiming to trick users into visiting the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=hubspot+social+media+certification+answers+quizlet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421209/normal_5fb52dce6f13e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411683/normal_5fb56c8c119a2.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/a301e79c-77d1-4f14-91bb-4720af2fde6a/prayer_before_exam_islam.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/32816517357.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/calibre_for_windows_8_64_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/root_apk_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00034501-d60a-46fe-b550-fa95c98c8113/rimworld_how_to_install_bionic_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7e5b19b-5602-4fbc-a1e1-bd6a02b623e7/99065675348.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94bca9db-511e-4bf1-8194-38c1ca57834f/76501820891.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/lavaxekifi.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/jubewajajaruzadidapogi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/313517f4-476f-4f5b-b033-4a43beac0f91/11429694482.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e19be865-b859-48f0-b24a-13dab3c74a55/jekegulutevolasafu.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/place_of_articulation_for_vowels.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/48016441315.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_off0000d9c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C5 5668 bytes
SHA-256: 7243371c3a44dfe2a24943107e660f0523e3ac712212bbab372c736cdbb993b5
font_01_sfnt_off0000ed06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED06 10564 bytes
SHA-256: 4e273d81e96651d0ff9483f093d15bc53a37bf8fa372fa782c9d4631038f4407

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