Malicious PDF — malware analysis report

Static analysis result for SHA-256 92298ad9da7a448d…

MALICIOUS

PDF

75.7 KB Created: 2021-01-10 18:38:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 97521a02bd5dc182c6246063b1461c50 SHA-1: e316ea7a1e536a6f80b4688eebf84f92087b1c0b SHA-256: 92298ad9da7a448ded3c6a71e3be4f7516e459ec27a6cd9149b448fe682022d2
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links pointing to a known malicious redirector, traffmen.ru. Heuristics indicate the PDF is malicious and likely a phishing or trojan delivery mechanism. ClamAV detection further supports this, identifying it as Pdf.Phishing.Trojan. No scripts were extracted, but the presence of malicious URLs is a strong indicator of 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffmen.ru/aws?utm_term=hybrid+video+compressor In PDF document text
    • https://site-1083673.mozfiles.com/files/1083673/banana_monkey_game_arcade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373779/normal_5fe811247a4bf.pdfIn PDF document text
    • https://site-1168003.mozfiles.com/files/1168003/fiwuzupi.pdfIn PDF document text
    • https://site-1177680.mozfiles.com/files/1177680/xajibuzoxatige.pdfIn PDF document text
    • https://site-1166670.mozfiles.com/files/1166670/wudezojivibabexinikibe.pdfIn PDF document text
    • https://site-1175031.mozfiles.com/files/1175031/garena_authenticator_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412174/normal_5fc74d7e90192.pdfIn PDF document text
    • https://site-1168501.mozfiles.com/files/1168501/college_football_national_championship_2021.pdfIn PDF document text
    • https://site-1172703.mozfiles.com/files/1172703/75303432048.pdfIn PDF document text
    • https://cdn.sqhk.co/mekaxosur/Bji5Rhj/42580936323.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382407/normal_5fed7e1618115.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bubeto/52508848955.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/xunudafebofewuz.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/before_i_go_to_sleep_book.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/moviesda_telugu_dubbed_tamil_movies.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_off0000ebfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFB 5240 bytes
SHA-256: 88fff40df8534c4047af4c218d29922b3ffca8ed9f6fc3b989b872fa1bfdad63
font_01_sfnt_off0000fdbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBF 10676 bytes
SHA-256: 983909a8abdd386f171c15dfbe61a34140856327c576cdb81c3cd61c68069e93

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