Malicious PDF — malware analysis report

Static analysis result for SHA-256 68dad1c98dd5f71c…

MALICIOUS

PDF

79.5 KB Created: 2020-11-10 12:51:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 1d4e51964e39c8c9b2c19615feb2fa5e SHA-1: 920afac7039d135bed4b96a5f7810042053605c3 SHA-256: 68dad1c98dd5f71c28da45916786210c75af262343ae9eb332818c8fb445d8b6
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafftec.ru/123?keyword=what+is+an+example+of+continuity+of+care PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368772/normal_5f8a4f811fc39.pdfIn PDF document text
    • https://rojusonevupa.weebly.com/uploads/1/3/0/8/130814232/xunalidixebo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366032/normal_5fa7d580c0444.pdfIn PDF document text
    • https://dosedupuwosiwoz.weebly.com/uploads/1/3/0/7/130776272/dopasujalatiso-givofi-wedutut-botifitamuja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379854/normal_5f9191fca638f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412899/normal_5f942b0e3969a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372987/normal_5f9228401e4f1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/c66d3235-5f7a-4982-a457-f420a200ad31/examples_of_bill_of_materials.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/adyashanti_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86defd50-1d85-4ce7-ab85-e20d1bd08804/magicite_orb_in_minecraft.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_off0000eca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA6 5320 bytes
SHA-256: bdb85675bce5952124fa748d125043f5dda7f57199a7421a53610b00ef9aa7ac
font_01_sfnt_off0000fea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA2 10584 bytes
SHA-256: 94750cdf84056397bdd723cb72558a46818a4c557b67e46e682a6a5dbef90201
font_02_sfnt_off0001229e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1229E 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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