Malicious PDF — malware analysis report

Static analysis result for SHA-256 99776dbc5e58af88…

MALICIOUS

PDF

63.7 KB Created: 2020-11-21 07:46:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 69210c6e6351880078d3c52af2c1552c SHA-1: 1bca6b1d93266e59763fcb63d1beb068490d6fad SHA-256: 99776dbc5e58af88c6b68b345423c1d05ec39f0839480ad1dd8cf7816ddd59b5
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'traffnew.ru', which is likely a phishing or malware distribution site. The document body, though partially corrupted, suggests a lure related to company information and a quizlet quiz, consistent with social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffnew.ru/123?utm_term=the+following+information+is+available+for+birch+company+at+december+31+quizlet PDF link annotation
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/461c37c449b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383922/normal_5f908a0e8921e.pdfIn PDF document text
    • https://runebipunozup.weebly.com/uploads/1/3/1/4/131406604/nobamonife_tabulodoxetejom_nadutuwulo_rilajefixesofad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380707/normal_5f9724cc9f45d.pdfIn PDF document text
    • https://degepuwenezeg.weebly.com/uploads/1/3/1/6/131607310/divorev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444622/normal_5fa10cd560780.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413239/normal_5fafa099974fe.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/c83bb1a8-cdf2-41a1-93c5-4d9cc8b56349/xubiwuruwa.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/74839336862.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/arterial_blood_gases_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/pathogenesis_of_hiv_virus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b46e919d-bd9c-4080-9a89-9de59853cc0f/23089951571.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_off0000b4fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4FC 6304 bytes
SHA-256: 104c01e4450f58bf3fb6e88ccd4568c791d50d066ab4ebc7c30ffb1796858c80
font_01_sfnt_off0000ca64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA64 11700 bytes
SHA-256: 20e354b5d1308d747cdf5e0bc60cc7b9393551ca8ce2d231f7704f98f544f865