Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c6f597dd5ef470b…

MALICIOUS

PDF

76.6 KB Created: 2021-01-03 03:37:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0a157491235e555d35cc3fda71d66541 SHA-1: 07a45b30edb88bfd23f0385acf5b44e64fcf7fa0 SHA-256: 8c6f597dd5ef470b5943f330ccd5d6d2e9aca45c5b656a47f885d18bcb50ca4c
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 directs users to a suspicious domain, likely for phishing purposes. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the detection suggest it may leverage PDF vulnerabilities or social engineering to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffine.ru/aws?utm_term=polystyrene+insulation+sheets+bunnings PDF link annotation
    • https://mufisifarugevap.weebly.com/uploads/1/3/4/5/134595961/pawodejasigaregifano.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424349/normal_5fb261494e1fe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373755/normal_5fcdb03f91896.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468836/normal_5fa359ec0e586.pdfIn PDF document text
    • https://cdn.sqhk.co/gemadaruvow/lhhOEjb/bike_race_3d_download.pdfIn PDF document text
    • https://cdn.sqhk.co/dalubevemex/fhdF4gg/idle_miner_simulator_tap_tap_bitcoin_tycoon.pdfIn PDF document text
    • https://sasikeruxet.weebly.com/uploads/1/3/4/8/134851076/7a58dda6d2280.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407983/normal_5fcca7eeec744.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477864/normal_5fb72796d72d1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/niwejufebaduzimi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/022f01d9-9d1d-4e4a-93a5-ab0fe61aca63/gesuponegab.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/94909700420.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00010bde.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10BDE 17376 bytes
SHA-256: df6732b389a90747a66c83d2e08a044af794a9db4137620a17bfecbec5f9a3a0
font_00_sfnt_off0000d3ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3AD 5192 bytes
SHA-256: c8caff37f6af72a924dad7a1c8b716ec1432282ca673a4b6dd34e64d81fbfe97
font_01_sfnt_off0000e55a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE55A 11276 bytes
SHA-256: ac499389b1d3fccdf5ef6a0647ba7fd1674aaee5a81397bd275a900dc8f97c47

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