Malicious PDF — malware analysis report

Static analysis result for SHA-256 93e7c94586ef0d6a…

MALICIOUS

PDF

67.1 KB Created: 2020-12-02 14:43:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 9a89c976b4d83ec7ad8ec96f311dd1b2 SHA-1: 14d9191cf7742c1c8aae667b8c9d6209ddb74b29 SHA-256: 93e7c94586ef0d6abc7f37d37b4b499fe2818b0d4d0dbe1e67c5f38275ef8221
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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 phishing or trojan payload. It contains an embedded URL pointing to 'traffset.ru', which is likely used to host malicious content or redirect the user to a phishing site. The document body, though heavily obfuscated, contains text related to file conversion, suggesting a lure.

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://traffset.ru/aws?utm_term=online+converter+jpg+to+pdf+joiner PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4529977/normal_5fc301eb79780.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383165/normal_5fbf38e419b9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387932/normal_5fbbb42faa77a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403688/normal_5fc71384d9ffd.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/3dbd5c47-3b51-4519-9625-ca9b10baa0e4/zidewotixozofakiruvekumog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edbdbdde-3224-42c6-bf05-3c81f37a9ffa/schure_media_group_contact.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c464209b-75e9-4fb2-9cb3-f7545fba3615/talowafalevogefen.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc378c5085bf90c0e0d73db/t/5fc53cc2e18c5c478ea5d605/1606761667548/divinity_original_sin_2_guide_amazon.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/fejipafuregumorobegu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7ccc7b5-20eb-46f0-9150-ec48cc009009/sunomanisi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0e313ca23154c95dba23/1606225459110/89615996945.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/98055211749.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4d5afa04221c7116b75d/1606372699786/red_queen_online_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc389842cf09257bd7c7fcb/t/5fc75ed29dfc2a40451edf20/1606901459119/sojikixez.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/vowels_worksheets_for_grade_2.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f171c14dfd36fef1b44e/t/5fc74a6c0623334b0c5da592/1606896237117/51508379957.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_off0000c8f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F8 5096 bytes
SHA-256: 13cb773acb56bedd1a623bc6e86339c0a8fc546b40359e2728383dd5361b4241
font_01_sfnt_off0000da73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA73 10776 bytes
SHA-256: 7849fae1c0665e0dc8daf48c4438349dd88eccd3f517ee6649f1f214ed56a6f1

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