Malicious PDF — malware analysis report

Static analysis result for SHA-256 6be3cf07f03bc78a…

MALICIOUS

PDF

82.4 KB Created: 2020-12-16 04:51:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3fb0674572792fe0db06a5c5a1ca9e5b SHA-1: e5126a17c6e757222b822f1b127e45aed194b806 SHA-256: 6be3cf07f03bc78afde91dfdb2f80f7f63554b9ff531de1e23c58651df6fc03f
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 0.9995

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://trafficel.ru/123?utm_term=what+does+vibing+mean+reddit PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4457296/normal_5fd95aa63cef0.pdfIn PDF document text
    • https://bavejojonosepes.weebly.com/uploads/1/3/1/3/131380601/7166188.pdfIn PDF document text
    • https://tejukikefuxod.weebly.com/uploads/1/3/4/7/134703803/pemowuv_zobiduwatojofo_tosakuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408990/normal_5f9c509044247.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459628/normal_5fcaa3d0cac76.pdfIn PDF document text
    • https://peziwotikiju.weebly.com/uploads/1/3/4/6/134602895/xebibesaf-zokoputevat-wiruliwumav-mumafufinamiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408330/normal_5fa65f7f413e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366377/normal_5fb288b71258a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc7855e1a9b7f6479380a92/t/5fcd4eb9c836a917f91c04e5/1607290553070/xuwut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4ba032d-5f96-4fa4-837b-a9413205fbb0/snapper_sr1028_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd73038b-fdfd-456c-8bf2-787dd644a776/90242468469.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/711ff821-339a-4d0c-b9c0-91a8b0451bf4/26116935264.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD935 5420 bytes
SHA-256: 4a9234886acae10c3fac4c92bc1ed1bad2640c9acf3bb793c7ca8e7764e8d0de
font_01_sfnt_off0000eb7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7F 8468 bytes
SHA-256: 1d82e0b43e7ca026261d40d975cd550a606e12e457b015ded00dc0533b9917d9
font_02_sfnt_off0000fda9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA9 11464 bytes
SHA-256: 6376caca3a930e6bdc9acc1b518444ec0d78408026f9af017b02040715ab7f9e
font_03_sfnt_off00012503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12503 16296 bytes
SHA-256: 02b55be228e556adedd813a892b2228d724e5a03985ee8486bdd568bc76795dd

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