Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d22b2a965d71c99…

MALICIOUS

PDF

77.0 KB Created: 2021-01-06 09:21:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1dfa67ac145f2aff85711bd99c7c2d0e SHA-1: 0754d3333ef44a61c1443aff57143a22fe4ed517 SHA-256: 7d22b2a965d71c99edf9cd0f9516a6cc35ba24a1c44ba0858b64ba2be0ffe2f1
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to 'trafffi.ru', which is presented in the document body as a download for 'Wildlife ringtones for android'. This suggests a phishing or malware distribution lure. No scripts were extracted, but the presence of the malicious URL and the overall detection profile strongly indicate a malicious intent.

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://trafffi.ru/123?utm_term=wildlife+ringtones+for+android PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4425224/normal_5fabba5a14fa7.pdfIn PDF document text
    • https://cdn.sqhk.co/rarirawibowo/tngfrNs/52230611077.pdfIn PDF document text
    • https://cdn.sqhk.co/juzogimuju/aigFXgf/spanish_word_of_the_day_app_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/getabemuto/Paehfgg/91134866784.pdfIn PDF document text
    • https://cdn.sqhk.co/forokuxodel/7icxih3/wallpaper_iphone_7_plus_ios_10.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/55a226a9-328c-4e1a-9ba5-32c32acec353/mink_dissection_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/ccna_exam_answers_chapter_7.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/guided_meditation_grounding_and_centering_script.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50c24850-7c5a-4a9c-8c33-4bbc694d4052/seminar_topics_for_financial_advisors.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b90d3b1-9290-4e6d-b9b5-834184b062c2/41944041473.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/sozizabenifubivijot.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/the_element_named_for_dubna.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/free_music_player_picture.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a21cdfe2-af19-49d1-a545-2dfcaee19fc9/bears_in_the_night.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_off0000efc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC9 5088 bytes
SHA-256: f8321a834ed9d6305acce16a0a88751c561d50f7126b4d6250f6ae64510975f6
font_01_sfnt_off00010136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10136 11040 bytes
SHA-256: b13cd61f7cd73718d0a9f3a81f22550699c8dfdcb8454428f84ef383a67bd836

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