Malicious PDF — malware analysis report

Static analysis result for SHA-256 40f84b5dc15412b2…

MALICIOUS

PDF

80.7 KB Created: 2021-01-28 22:35:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: e008546b948d9f186797b83d27275a22 SHA-1: 185b3344a70ed7094d5e4b3073e573f4f20b16dd SHA-256: 40f84b5dc15412b2c46ed46f0babd6b3ac2ee4edada3bd40d2e35256421b9358
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URL, 'https://druttle.ru/123?utm_term=swedish+folk+music+groups', is the primary indicator of compromise, likely leading to a phishing or malware download site. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest it's designed to redirect users to malicious content.

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://druttle.ru/123?utm_term=swedish+folk+music+groups PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4455399/normal_5fd0fafdc699a.pdfIn PDF document text
    • https://medimigo.weebly.com/uploads/1/3/4/8/134864966/2305869725.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404488/normal_5fc986840ccdf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368951/normal_5fdd8e8a06f1d.pdfIn PDF document text
    • https://bafumujem.weebly.com/uploads/1/3/4/4/134498711/2673325.pdfIn PDF document text
    • http://theharaka.online/52396818813cpzxx.pdfIn PDF document text
    • https://puralabeno.weebly.com/uploads/1/3/2/8/132814071/jogisak-wifodepub.pdfIn PDF document text
    • http://macsk.space/390790284931i5o5.pdfIn PDF document text
    • https://vebupefipi.weebly.com/uploads/1/3/4/4/134497137/6774565.pdfIn PDF document text
    • http://blubadgehelp.net/rafewurinupexalkede.pdfIn PDF document text
    • https://cdn.sqhk.co/vaminika/ick4xRd/zokiruzuxijulepabopiposo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484605/normal_5ffce260e77a2.pdfIn PDF document text
    • https://dalokagamamis.weebly.com/uploads/1/3/4/6/134695183/jarawiketolib.pdfIn PDF document text
    • http://naturaleone.space/31861555562x3gdn.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/fasomusogapovi/ballroom_blitz_tab.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/59644070432.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/46992900384.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/pamelulorirezabimafenalix.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_off0000f797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF797 5620 bytes
SHA-256: 99083599df51d5daf193d3888475da9ce9f6b4d838051a7f631036737d0f480a
font_01_sfnt_off00010aae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AAE 12908 bytes
SHA-256: 92791c6a01e0e2f5780e6a1fcc5c382502bcf788adfa47c118561a44743c1124

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