Malicious PDF — malware analysis report

Static analysis result for SHA-256 d06ede58d868c7e4…

MALICIOUS

PDF

68.0 KB Created: 2020-11-12 17:39:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b4f635b043f1af5f8c12ea8d186c8eae SHA-1: d7019b8f1397b5bf90e281a0fb51b64fa6d0c4c6 SHA-256: d06ede58d868c7e401a16d4ad92ac432408f2d30942dae56604c87d4ea833a3c
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://trafffi.ru/123?utm_term=merrimack+high+school+phone+number PDF link annotation
    • https://lenimupet.weebly.com/uploads/1/3/4/0/134013040/6873275.pdfIn PDF document text
    • https://sererepe.weebly.com/uploads/1/3/3/9/133999843/afc0c8f0053304.pdfIn PDF document text
    • https://paleforekirito.weebly.com/uploads/1/3/4/5/134579508/kalobuvola.pdfIn PDF document text
    • https://jujodupif.weebly.com/uploads/1/3/2/3/132303189/c938292588.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420587/normal_5fa9c9e9c89dc.pdfIn PDF document text
    • https://fidevawane.weebly.com/uploads/1/3/0/8/130814252/e49cab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482853/normal_5fa932e9915e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410191/normal_5f9880fc937be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404124/normal_5fa323d33901e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365583/normal_5f8746d33a4e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448992/normal_5fa3ac6636165.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/04fd975b-1eaf-4204-895c-6c1773d31283/sisesaveboxipesijefesupo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d637f0ec-5e52-41d3-9bc2-06c74da1ac1b/40922861168.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e256e06b-83aa-4199-b213-b71bd4065511/3901592418.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c12a536-ae0b-4538-ba6b-5a5bd3ae66f5/law_of_diffusion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f5e8b48-f9ea-4982-94f6-85f6f0b1fce5/nogamomuzepixololesidi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb2a9dc0-5bea-48dd-8c02-03f66b1afa73/half_orc_fighter_images.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c79d2093-c34c-4781-a5b4-59ae376e1dd7/12993821679.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_off0000cb44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB44 5556 bytes
SHA-256: 94eb7785d496f8c7e36a38e4170d9a6ec1de439806ef5f0504b696aaf5b82566
font_01_sfnt_off0000de04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE04 11020 bytes
SHA-256: 7b92848e308e08e3a999ced6af63174754cf2c5bf0953ad04ede32bf21bf25f4

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