Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e3dd627af9bd8fb…

MALICIOUS

PDF

72.5 KB Created: 2020-12-29 11:01:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: d678462f7873f25032491b6c37215ee2 SHA-1: 987b9e6768ec37f8771c4c630877e29c14b0d4f9 SHA-256: 4e3dd627af9bd8fbdd0630fda20faf015b19829d38857eab3610f40b9ccf613e
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by both ML classification and ClamAV, flagging it as a phishing trojan. It contains numerous external links, with a primary URL pointing to a suspicious domain that appears to be part of a link farm. The document body, though heavily obfuscated, suggests a lure related to 'Dj khaled the keys pdf download', likely intended to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafffe.ru/123?utm_term=dj+khaled+the+keys+pdf+download PDF link annotation
    • https://nodifolosorak.weebly.com/uploads/1/3/4/7/134758422/9042743.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482230/normal_5fcc9d16be4b1.pdfIn PDF document text
    • https://rabugotekinevod.weebly.com/uploads/1/3/1/8/131871666/vikuwa-zonowufe-xepakuzukogo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466165/normal_5fdb86f9a0f05.pdfIn PDF document text
    • https://guxofoxevi.weebly.com/uploads/1/3/4/7/134737998/lifinaxikifoza_kizomura_nenuzipakogase.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/26303a8e-19d5-4c4b-ad95-09f61dc1b164/kimujixosefuwuvomilipotad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29d25fbe-bd5c-417b-889f-9f72afe38591/61972986942.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/025430b7-fffb-4dc4-b661-39760bf9834c/xebiteleme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdebf23b-57e2-4cf0-bdc5-a71c5e6690f8/76220791829.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40d60da2-1f29-43a7-8dce-9ad588c8e4f3/idle_defense_dark_forest_tower_combinations.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca8e2b8e-9c45-46f8-96e6-bfe9e5a65eeb/zesiboriparotavijekuro.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/80971364744.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/python_pseudo_code_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5286733c-7397-46d2-a6ef-d270f8430216/anglo-saxon_riddles_examples_with_answers.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_off0000dfea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFEA 5364 bytes
SHA-256: e2163582deb7b23a416bcb385dd52f9ea63eaeb83401bd10d27244c0411cd774
font_01_sfnt_off0000f24e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24E 10140 bytes
SHA-256: e36b01bf7ed895efbdf678ae87f2d2d8bf1beba0eb9644b6baec865cc21a6856

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