Malicious PDF — malware analysis report

Static analysis result for SHA-256 da75db5685d18f99…

MALICIOUS

PDF

77.2 KB Created: 2021-03-18 16:14:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: cc3fde011f8680726bce9a2ec4c842a4 SHA-1: b0b032e0b8fa97b5a97b55e20fa7f6a157cf02fc SHA-256: da75db5685d18f99706bba99998ab535080610da8d4e65f08fd70a3d14df382e
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains a large number of embedded external links, suggesting a link farm or phishing attempt. While no scripts were explicitly extracted, the presence of numerous URLs points towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/strik?utm_term=how+to+start+crochet+a+blanket+for+beginners PDF link annotation
    • http://koxoteripuxafo.iblogger.org/dirt_devil_royal_5_belt.pdfIn PDF document text
    • http://kadaxejob.mypressonline.com/84444616969.pdfIn PDF document text
    • https://cdn.sqhk.co/boguzivipel/idhdzbQ/47195277514.pdfIn PDF document text
    • https://maxuvejalova.weebly.com/uploads/1/3/4/2/134265339/9696957.pdfIn PDF document text
    • https://cdn.sqhk.co/wowobavukelo/bvKjhX8/machine_gun_simulator_free_fire.pdfIn PDF document text
    • https://vozozexofevufut.weebly.com/uploads/1/3/1/8/131871902/95c6ca.pdfIn PDF document text
    • https://tuxabonelunod.weebly.com/uploads/1/3/1/3/131379680/nerumire.pdfIn PDF document text
    • http://dedaruk.scienceontheweb.net/dezexezipexosuju.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ed36ca5d-e6e9-4caf-8bbb-3a8af5cfee16.filesusr.com/ugd/971556_cdc8266e5f094360bcb75467d43cb3bc.pdf?index=trueIn PDF document text
    • https://4c5ad993-366d-4b3a-aa99-9b6f56583180.filesusr.com/ugd/01e791_50936edffea946509b6b1e8cc4f06bb8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/21780332815.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/ratobav.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/kidigasadefudanovusafaja.pdfIn PDF document text
    • http://mewudupite.epizy.com/molada.pdfIn PDF document text
    • http://kubugaganovipo.rf.gd/lord_of_the_rings_amazon_cast_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/amleto_testo_completo.pdfIn PDF document text
    • https://ee897e78-a157-4eb5-8a47-d615096087a2.filesusr.com/ugd/113e89_0e7cf910ed674b509fd4e339b5b4bad7.pdf?index=trueIn PDF document text
    • https://edefa294-c65c-46c5-840b-8a4669b9fdfe.filesusr.com/ugd/e4a001_0c7f4c7c19c641c8ac9f66908a109d00.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sorogamat/math_worksheet_for_8th_graders_algebra.pdfIn PDF document text
    • https://98cdd5c5-c43e-49eb-9373-39517e896cbb.filesusr.com/ugd/90661f_12ed5fd443ca4241babda8c25e03c086.pdf?index=trueIn PDF document text
    • http://muvubaxu.epizy.com/muwilalovedaj.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_off0000ef6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6E 5400 bytes
SHA-256: 03eaed382416ccd09704f348257e7f9cbf2db2aaaec8ec598986f2c25947185c
font_01_sfnt_off000101db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101DB 10564 bytes
SHA-256: b97b1428496a7513ae5159939dbf8d4c38bef8be343fe59079012b6314455196

Open this report in the interactive analyzer, or submit your own file for analysis.