Malicious PDF — malware analysis report

Static analysis result for SHA-256 08188140c2190345…

MALICIOUS

PDF

69.0 KB Created: 2020-11-17 17:47:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 056681ed1696741404117d7aff3fe304 SHA-1: dd61cfc29f9ef2d9d59742e574a2c4046350f5a7 SHA-256: 08188140c21903452f249263fd53e9f95b8e366f0779710f5130a438d561ed11
76 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a heuristic indicating a payment redirection lure, suggesting a business email compromise (BEC) or phishing attempt. The embedded URL, https://trafffi.ru/123?utm_term=accounting+for+dummies+online+free, is likely part of this lure. Although no scripts were extracted, the ML classifier strongly flagged this PDF as malicious, and the overall pattern aligns with phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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://trafffi.ru/123?utm_term=accounting+for+dummies+online+free PDF link annotation
    • 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://uploads.strikinglycdn.com/files/6b4f6113-d0f3-4835-9105-e2f8513ff3dd/reluzav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c7f4387-6c23-45f9-979f-ccce038431c2/82231943582.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae1dc77b-3a69-4f28-9448-b4cdb090018c/62681112981.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49748bee-1b29-4035-b8de-f74a11985809/53152979580.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39a45e44-8f6a-479a-a127-99ff755a0a1f/larudelolasiwezipipokawig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/deffa89f-808d-489c-aff8-94f1b4427543/94606766242.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c2d7bc1-266f-4513-b6cd-a407e49b9111/bomesomajowexaxurowo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9a00fee-497e-4b7a-8a87-40ac29427217/92926284205.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd9bff36-99ea-4341-8d09-5647d2554d62/sekitimokonubepoxafaruz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c978db7-12b9-436d-9418-b0082128a1fb/58387778501.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94065121-fafa-4fd4-a11c-b4aa6674c5e6/15726302332.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1024a746-f7a4-456b-85a9-d6aa0ec8c6a5/st_emily_school_supply_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf9679ea-fb0d-464f-b4e0-ac309f3fefee/laluzizakuxane.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_off0000c587.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC587 5000 bytes
SHA-256: 18ed21f8965dc880a0f8203a12104a40a7d90024253bd59b176dcd0b4ba22bab
font_01_sfnt_off0000d66b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD66B 10196 bytes
SHA-256: 6a82c3802218c56e5af969e622a915fbaca5d5a80de7173e9de0ef30ec384253
font_02_sfnt_off0000f907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF907 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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