Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfcc5eeede11c4bb…

MALICIOUS

PDF

78.2 KB Created: 2020-12-23 14:08:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 7bd05aa458a72493ef299e7ee5068a89 SHA-1: 918429e9114393cf635712d3c1bf510c9964f238 SHA-256: cfcc5eeede11c4bbf94cc966db2f6a31d1a57420975a8c87e09d34ecf92d117c
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 flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. An external URI, https://trafftec.ru/strik?utm_term=lullabies+for+babies+to+sleep+8+hours, was extracted, suggesting the document's purpose is to redirect the user to a potentially harmful site. The document body contains garbled text, but the presence of the URL and the high confidence malicious verdict strongly indicate a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafftec.ru/strik?utm_term=lullabies+for+babies+to+sleep+8+hours PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407070/normal_5fc229ec69dd7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369782/normal_5fdde27ae2b63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460266/normal_5fb7146a42f6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373992/normal_5f8934321e03f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380090/normal_5f9cb260ba7d1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379489/normal_5fcf198bda45a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409604/normal_5fb375ed62313.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376126/normal_5f8c10054d472.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/ritoma/skinning_gold_guide_bfa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ba77e18-6178-4247-907a-11e5ba7f1e7d/86570905635.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c2221c4-e861-44d5-8380-2b2a561a8b55/nomivosazuvu.pdfIn PDF document text
    • https://s3.amazonaws.com/kisagoz/movies_free_online_bollywood.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19b36574-cbef-46e9-89a9-43f2ba68e440/rovunelaxazu.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/scosche_magic_mount_elite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ec2b564-5599-440c-a5ca-682e8417b400/votagegemure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31984b6b-189b-4c8c-93eb-870237b45bd4/36244204869.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/259871e5-8cf1-4927-a4cc-b5f4a305ddf7/3046929592.pdfIn PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/zimeviborodaserexupazoj.pdfIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/adp_workforce_now_app.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/kirisuzinakudiwadu.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_off0000d7c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C2 7120 bytes
SHA-256: 9038ba4e1461647c1cc2294f6ce2e23d54d10b0a10c5e547820f85965d2cf015
font_01_sfnt_off0000ef8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8B 5264 bytes
SHA-256: d1b32d26934528cc06fa36f96210ec5cb648ed3d17708911cf572460e5b7853c
font_02_sfnt_off00010162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10162 12268 bytes
SHA-256: 6a0d6ebdedcc69d388fb96247363b7c693c749208b7e05099d1b4c4f47b98d71

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