Malicious PDF — malware analysis report

Static analysis result for SHA-256 f42375c8e7f8ad5d…

MALICIOUS

PDF

71.4 KB Created: 2020-11-21 00:08:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 2a5d5def16d3b3b9220348814e5a30a3 SHA-1: ec68918725a6fe71eb47d247afa94f8ea2e9ad67 SHA-256: f42375c8e7f8ad5dd0a0b8596efe3e44163e5cf3295df9b33a28165eeb7a6f6a
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. ML and ClamAV heuristics strongly indicate maliciousness, classifying it as a phishing or trojan. The document body, though heavily obfuscated, suggests a lure related to an ebook, likely intended to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/aws?utm_term=ebook+arduino+bahasa+indonesia+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408871/normal_5f9c56b017e28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393209/normal_5fb35fea82bd1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413983/normal_5fa5703cc2db4.pdfIn PDF document text
    • https://suvuzijovibalis.weebly.com/uploads/1/3/4/6/134660606/1640431.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412593/normal_5f95dc70254d0.pdfIn PDF document text
    • https://baxovazexozubuv.weebly.com/uploads/1/3/4/3/134318553/4662079.pdfIn PDF document text
    • https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/a2bf9e7b5b332.pdfIn PDF document text
    • https://xanugobolenaz.weebly.com/uploads/1/3/4/3/134371028/53bf7c.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/muvemasoxaji/microsoft_access_advanced_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/aryabhatiya_sanskrit.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/tesode.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/access_database_tutorial_2013.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_off0000c923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC923 5060 bytes
SHA-256: 3da4fe62f689beca92b91216b01ee971ec7e4851f31ebaab4229bd433b4f75f7
font_01_sfnt_off0000da40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA40 12172 bytes
SHA-256: 3f196d4239294601ad32a1b9a9e747e75a770b2a926df53e6a3e8cdea1f00f66
font_02_sfnt_off0001030b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1030B 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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