Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae974f9816bc5d4f…

MALICIOUS

PDF

74.9 KB Created: 2021-01-24 10:27:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 65ecc000e6c0d689f45c6bd486bfe5e0 SHA-1: 82b6085b166f4eb9931d533a60b9673f9b90cd33 SHA-256: ae974f9816bc5d4fd1247091b4070a42d8eef7f9ab59ba16b293011272b4d660
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, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'maypoin.ru', which is likely used for phishing or to host a malicious payload. The document body, though heavily obfuscated, appears to reference a 'Fisher Price monkey swing manual', suggesting a lure to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=fisher+price+monkey+swing+manual PDF link annotation
    • https://cdn.sqhk.co/zedawuzijis/idahaS1/average_age_of_cavemen.pdfIn PDF document text
    • https://cdn.sqhk.co/ledodatefu/g6Jihjg/21980331899.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504791/normal_5fdc641d800c5.pdfIn PDF document text
    • https://cdn.sqhk.co/vemudumuxixu/bjijchg/66686184622.pdfIn PDF document text
    • https://cdn.sqhk.co/gopuxipo/aCgeDhb/8279756596.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427523/normal_5fd1f8a81efcc.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/rovuweraja/49378734039.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/personal_loan_on_marksheet_in_delhi.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/donapobepizuzimoxubabu.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/irrelevant_sentences_worksheets.pdfIn PDF document text
    • http://tujefozumuresul.epizy.com/38861552902.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/budget_planner_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/associer_plusieurs_fichiers.pdfIn PDF document text
    • https://s3.amazonaws.com/gekojulog/66197924481.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_off0000dc38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC38 5364 bytes
SHA-256: 5acb60628441440ebd7da2dcc2406096413a0f4ab5126270cf00de29520f4da3
font_01_sfnt_off0000ee5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5A 10136 bytes
SHA-256: 111807855ba4b70cd408a8a51432b8cdc9fb1c57709e4d8873358fe185bec2fd
font_02_sfnt_off000110df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110DF 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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