Malicious PDF — malware analysis report

Static analysis result for SHA-256 12822e5710643760…

MALICIOUS

PDF

68.4 KB Created: 2020-11-28 10:43:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 3af5e75d6011041bc015ac010a1cf0f3 SHA-1: d87e962e4f6ccc3858a958098b9dcf747d4da603 SHA-256: 12822e571064376003a0d3280e7ee302f0b59273b854096fb0dcbe9495e580fb
156 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. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation 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://trafffe.ru/strik?utm_term=rival+ice+cream+maker+recipes+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408706/normal_5fb2d6c829c45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365659/normal_5f87253da6845.pdfIn PDF document text
    • https://nipufijupetobug.weebly.com/uploads/1/3/1/4/131482996/6432a0b0bc7c.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/kovilowab/cydia_older_apps.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/nc_dmv_driving_test_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/salsa_salsa_port_jefferson_delivery.pdfIn PDF document text
    • https://s3.amazonaws.com/fenatagazise/38045247432.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f7474f6-2f47-43f2-a61b-aa6b63bfa294/17940755659.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45358bf8-72f6-4038-a853-70cb25bb082f/46785521771.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1159054-d3f7-4632-8a8b-a05ba88a03c1/wugekodo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/054daf9b-114e-4e3f-98fd-bfde48265ef9/82077032011.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bff7e15f-87e4-478c-9b8f-4a29fb6f557b/dapaxatesesoxixe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8709fa95-3ff3-48a8-9bde-7e5ded4f9273/69870321422.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_off0000ce66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE66 5208 bytes
SHA-256: 31239dfda92eb75ec4510232a054cfb51f7c3ea60769b22fc34ccabb4da2bc96
font_01_sfnt_off0000e014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE014 10744 bytes
SHA-256: 72da3aa6a1de3e9950f9e90dba1fddbd4fde1d3da410e3ca2b9d27bd739943c5

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