Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc4567dbf0409fc0…

MALICIOUS

PDF

76.4 KB Created: 2021-05-29 10:06:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a763f60a34fdd58eeb3151af7fa9ab15 SHA-1: 1feaae9d67243954484c876b1039abd2363ef7e0 SHA-256: dc4567dbf0409fc037d94d32ff54adfc62d5b2af768ef13061bd3cbe3a39016d
116 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a QR-code lure. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://vilenefex.ru/123?utm_term=android+handheld+barcode+scanner+bluetooth PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403141/normal_606dfc681354f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391620/normal_6009c0e6192fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423460/normal_601b4bb81e820.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404497/normal_603356eb02c46.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452612/normal_60009feb2fa15.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459163/normal_5fde837cb5945.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460950/normal_5fd88c35a3cd6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408464/normal_6027024d9ffed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457318/normal_5fc69e3909472.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384459/normal_604d8c8ea5809.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476768/normal_6035d1b302d36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451368/normal_5fe7ca8783281.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529281/normal_6058c233d3187.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/d789864a-4bfb-419e-944e-651e0bb3fece/when_did_ruger_improve_the_mini_14.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c350d366-5ac1-46ac-8a97-cd22924760fe/whole_body_stretching_routine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecc54019-a744-45d6-b655-fa1d725f820e/jopogejeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/182ec166-13f0-4285-81cf-d2c2e747d108/80887116508.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/450414c1-7049-4f1b-bf6f-644b19465f49/macbook_air_tutorial_for_beginners_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c127bc64-e459-4ef6-8fd3-df4a6df02cf4/ford_3000_tractor_parts_on_ebay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea6f6e3e-ce28-4af2-a38a-16c391fd19df/58197636888.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7b42080-e7bb-4178-9bc3-2e5913e15e80/sexutunirijo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e82bfa6d-f6e3-46bf-857f-bf5d33eb833c/tolototexinoviwejar.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_off0000ed98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED98 5156 bytes
SHA-256: 250cf79d6968d8c2f5a5e448ec4e40b50efb2cae2d88986a0c7eeb5deca04e5c
font_01_sfnt_off0000ff14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF14 10800 bytes
SHA-256: 80bd26f2258048d0117c2d8139f6eab9498fcf54b9706f88cb7b0b8f98352986

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