Malicious PDF — malware analysis report

Static analysis result for SHA-256 333ed18c1497abaf…

MALICIOUS

PDF

82.1 KB Created: 2021-01-25 22:11:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c4e9d76232c8d562801ff1e626b27e9d SHA-1: bae1c733c4bc8fa8a0449ec6dc9b2cd8ba5d9a09 SHA-256: 333ed18c1497abafc4c649394c76144907e3988bd7ab05bd062739a1a661aa8d
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'maypoin.ru', which is likely used to redirect the user to a phishing or malware distribution site. The PDF structure and embedded URLs suggest it's part of a phishing campaign, likely delivered as a spearphishing attachment.

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://maypoin.ru/123?utm_term=african+american+theater+nyc PDF link annotation
    • https://cdn.sqhk.co/wibononuve/hO8cigC/surf_shack_vpn_cost.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365624/normal_600a47c80b604.pdfIn PDF document text
    • https://cdn.sqhk.co/duputokodoz/txZhhjc/31345399891.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380411/normal_5fc88e4ce331a.pdfIn PDF document text
    • https://cdn.sqhk.co/gogoturowib/jfFZWgh/best_songs_of_john_farnham.pdfIn PDF document text
    • http://topmassage.net/injustice_2_harley_quinn_cosplayjdzza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486041/normal_600c7f3c4bfcf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424341/normal_5ff77b11cbf08.pdfIn PDF document text
    • https://cdn.sqhk.co/levowexesu/ghv8Yha/39914628978.pdfIn PDF document text
    • http://arevakar-travel.com/paradise_california_bowling_alleyw3pxc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385011/normal_5ff59ded44630.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470209/normal_5fe9046166cdf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458388/normal_5fc5d20fa4410.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425784/normal_5fd08885b3d21.pdfIn PDF document text
    • https://cdn.sqhk.co/kupovite/0ziiUgc/43617068794.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sedowedi/kekagerukigoluj.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/dibubipiledez.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/indeed_bookkeeping_test_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/bkav_vn_home_fixattrb.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f49d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF49D 4680 bytes
SHA-256: da0982b3910b260cafed6ea978b8288d7c766875df0cfc1de25a5b02ba5d586d
font_01_sfnt_off00010447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10447 12484 bytes
SHA-256: 8726480dc0473212370263d2533a7d78dbcf8017d07ac853744724a6ae4454cd
font_02_sfnt_off00012cc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CC7 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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