Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5bea0a60327e5b3…

MALICIOUS

PDF

74.6 KB Created: 2021-06-06 19:52:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4f09590a80b331d8f9260a6f4259780a SHA-1: 66b5cb44f31f894f9de424470bd8127a9849baf6 SHA-256: e5bea0a60327e5b30f97194adb044637b5f8b3c6eeb046a7a893828fe7e3ca22
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. The presence of numerous external links, many of which are likely part of a link farm, suggests the document is designed to redirect users to potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and link farm heuristic point towards 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
  • 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://cructi.ru/pbw?utm_term=short+fantasy+books+for+5th+graders PDF link annotation
    • https://guxitodek.weebly.com/uploads/1/3/1/6/131637279/29fe30c83465e8.pdfIn PDF document text
    • https://vutadatibanol.weebly.com/uploads/1/3/4/8/134883393/f3765b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368985/normal_60694ad5c46ba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460043/normal_60093dea81b52.pdfIn PDF document text
    • https://fikomepa.weebly.com/uploads/1/3/5/2/135299400/3c241a2c0.pdfIn PDF document text
    • https://niritopep.weebly.com/uploads/1/3/4/6/134634222/dozedumiwulapuweka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484376/normal_603ed5ddbf500.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/3b4d6069-db61-4673-bda7-dea8d4f78089/n._gregory_mankiw_brief_principles_of_macroeconomics_9th_ed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5da3c37c-9ea4-4870-b6ce-15b3aa80ee81/harry_potter_and_the_half_blood_prince_movie_plot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b2cc650-5dc0-4fe6-a559-af31f37467c9/59993959129.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/702fbda4-3f84-4249-ac6d-9add9d79540a/92037446303.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95f67b1b-20ac-42a7-aef7-06ed62c0aa68/how_much_are_miniature_long_haired_dachshund.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b24b6e6-1c82-4f47-a949-33781794cc05/grand_theft_auto_san_andreas_mod_apk_highly_compressed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16503feb-cb49-466b-906d-b61326bc903e/stephenie_meyer_twilight_novel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af12e91d-11ab-44c8-bdbd-ffb28839d55a/manual_ar_condicionado_porttil_philco_ph11000qf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62e994d2-acce-451c-98c0-1c530ee902db/60231085309.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bfb5bd4-49ae-4859-91a4-ed1cb684093f/rummy_plus_hack_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59075ddb-49e2-42d1-97eb-4e6fd115d242/how_to_become_a_successful_songwriter_singer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02d434d7-6a60-4c81-950b-d372333c5bff/84515135291.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e53e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE53E 5668 bytes
SHA-256: 193ddc7b7154dc1cbef8440050b974cec4a1236781eecf58e8fa460f4a783b00
font_01_sfnt_off0000f885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF885 10984 bytes
SHA-256: c5d855e33d333fae0e0f40fa33939086b36678719383657ae16f59b4e2efcfc2

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