Malicious PDF — malware analysis report

Static analysis result for SHA-256 01e5f95355de934b…

MALICIOUS

PDF

70.7 KB Created: 2021-05-29 07:40:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: ecebda508887332023632009e6b20931 SHA-1: bb8ec8104fef747ff95638683a542963d254f101 SHA-256: 01e5f95355de934b2bf040cba36a974ae7585bb00a64488b122f6dfdda306df8
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF was flagged as malicious by multiple heuristics, including a critical finding for a malicious redirector link and a PDF link farm. The ML classifier also returned a high confidence score. The embedded URL points to a redirector, suggesting an attempt to lead the user to a malicious site. While no scripts were explicitly extracted, the nature of the link farm and the malicious redirector indicates a phishing or malware distribution attempt.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/123?utm_term=sheet+music+ghost+riders+in+the+sky In PDF document text
    • https://static.s123-cdn-static.com/uploads/4465147/normal_5fe164fb09f3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486535/normal_60126a4f2aedf.pdfIn PDF document text
    • https://nidimikijugura.weebly.com/uploads/1/3/4/7/134710695/711bbf5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403140/normal_5fe43f7bdc839.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383687/normal_604da997b9766.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367674/normal_5ff7ce36641f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403121/normal_602ab9123459b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380530/normal_5ff6c4b40c2b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453338/normal_605a2809a9ad9.pdfIn PDF document text
    • https://korubati.weebly.com/uploads/1/3/7/5/137515423/bc771.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/bc942f8d-3cbe-4ead-a592-4fd267538be2/juxufelojevivaxiwates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd014edb-2ac0-4c37-b793-56d300ad8b1c/what_is_a_good_example_of_central_route_persuasion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38cf2a69-e45b-4cd7-bdcd-8c6ae2902533/how_much_is_a_new_home_sewing_machine_worth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10b61f68-42a2-4d13-a559-b8bc65857084/78124034636.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a00d6031-dc7c-417e-a368-460d1c9f1b43/kexirolatalufota.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/289748ca-c6fe-44c5-bcc1-1fd0252e2b82/nimifone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56f23535-65f3-472a-ae22-5d5bac6c403c/33472260228.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/808f7695-b94d-471f-b13a-6b8df0be0cea/zidulolutewose.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/112171f4-a51f-4457-98e2-cab57d8fad9a/96900303401.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_off0000d42a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD42A 5380 bytes
SHA-256: a1c26249a5c6848a88eddbae523301dee2556d699f71315b5f13bb397e926f98
font_01_sfnt_off0000e655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE655 11552 bytes
SHA-256: 3dd5c156862c614e185ad475daac969d698005868dc149e7ca3a8771c9ab31d7

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