Malicious PDF — malware analysis report

Static analysis result for SHA-256 438273266d69cb60…

MALICIOUS

PDF

66.7 KB Created: 2020-12-17 10:59:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 7568fd5e76aa9fb2fc2c8a862087c8f5 SHA-1: 4939e98026132ba721b53af7e3f7260d7dd99ba1 SHA-256: 438273266d69cb606146dfd3d109e7dd596885cb352a3a2dc316fb4d9e84e4b2
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URL that mimics a search engine result, likely to trick users into clicking it. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. No scripts were extracted, but the presence of an external URI suggests a phishing or redirection attempt.

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://traffine.ru/wb?keyword=visual%20basic%20datetimepicker%20format PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tevigotu/dolphin_emulator_apk_android_4.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/8270284718.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/23673711387.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/garimexajojes.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc547c8c6229360ecc9c624/t/5fcf6c1457846c5b83569f80/1607429140424/beast_quest_game_app_download.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/zygote_body_android_app.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc77bf45c272238a81a68c4/t/5fd668bed654060362c8ab45/1607887038780/kerojodozogegupakorut.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc50e1111f6a41984a06ac5/t/5fc520d0bc819f1cf47cdf30/1606754514491/tigogepumij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91bde78b-9d17-4ad3-989b-1b4750739afa/58292435350.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0879da3bf4b14aba759f2/t/5fca8f34c81a0b0777ccc76c/1607110453063/wordscapes_level_8243.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5aba47d0c8f249d617a7e/t/5fcfd308e1dd1c3dab06ec18/1607455496553/up_swordsmanship_training.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0fa6d5687f52b6b8190b1/t/5fd08b256cbf29106bff0661/1607502629076/zugafazukovowipa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6c59a03f04e270fe027bd/t/5fcf42670ff3944fc5569739/1607418472156/free_spelling_test_template_for_first_grade.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_off0000c5b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5B9 5468 bytes
SHA-256: 1ef407c5891bcc0a76c904c9cefb4746f88c6b59819efc9f49a9983b851d404a
font_01_sfnt_off0000d83b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD83B 11284 bytes
SHA-256: 87638c75300580e49070eb1a3aebe49330f6c11ca0f1552f85f9e6355fc8af6a

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