Malicious PDF — malware analysis report

Static analysis result for SHA-256 2448b73d32131cee…

MALICIOUS

PDF

67.0 KB Created: 2020-11-11 13:53:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 385fa260d6ffd177bb3810fe647a66a4 SHA-1: ddf66dc373012bbea28a5a7f3f2687fcc50e8464 SHA-256: 2448b73d32131cee5366483979aaa0af4738c2968b81eb03df8a2417f27eb939
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?keyword=no+filter+band+fl PDF link annotation
    • https://tabuxeniki.weebly.com/uploads/1/3/2/6/132682737/kagofitibotafax-sefirup-juratotudopodel-derira.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/c01df716-b004-4d5b-9f3e-ca80986f779e/65577297068.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05df8d1d-0a0e-4211-a65b-f0e0636bbadc/38173498744.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f24a389-b7f9-46d2-9f76-2c4fa7b1f9cd/park_square_apartments_spartanburg_sc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b91d1a6-f59b-4100-9416-057c99c97b13/45918465427.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/10904589060.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53915481-67ec-4553-9f5d-39894325208d/31263476603.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/650c4116-37e2-47fb-8163-2eced2f25552/76009995017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb6d8f1a-9c20-45d7-997e-2c97082c8fa2/kimividikekumimul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a0944ac-1c0c-4b54-a79c-4436cdaa8608/72175795532.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9cddab6-ee11-4be3-b97e-d77bfe981dd2/langrisser_banner_schedule_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/59550076397.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0433b703-f531-4d05-beec-de7e56f413a6/15228767117.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01280798-1f24-4120-85ad-f625ca1e8258/89970411756.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d63313c-f58f-449a-8a04-4e6d4d589002/sketchup_layer_color.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f2ad473-1779-4054-a774-0a243468a87e/97008038411.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_off0000c93d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC93D 4832 bytes
SHA-256: 27c1979c5b52042e25410e20c7abed1500aed4c19a1ffc3ad04da7921e4514d7
font_01_sfnt_off0000d9ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9BA 11036 bytes
SHA-256: 26eca3ed3c289b8f223a0a21b6328fbc21c39501accdf4ac2436dccafbc8a46c

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