Malicious PDF — malware analysis report

Static analysis result for SHA-256 a10aa0290f3391b1…

MALICIOUS

PDF

77.9 KB Created: 2021-03-14 09:49:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: e8d3e5174189899a1c8c6f724cc60984 SHA-1: 376c00da1a46529fde47654ec98e1c020e5e8cfa SHA-256: a10aa0290f3391b1e0ccee578b35aacb95fc1463c9921b5d3130e6f247fd1501
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is a strong indicator of a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support the malicious nature of the file. Although no scripts were extracted, the presence of a malicious URL suggests the document is designed to redirect users to a harmful site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://yafferge.ru/strik?utm_term=quadra+fire+cumberland+gap+wood+stove+reviews In PDF document text
    • http://foxiduwanati.mygamesonline.org/tupuru.pdfIn PDF document text
    • http://jalukilesojed.22web.org/4795303380.pdfIn PDF document text
    • http://gulebamabixaku.22web.org/98902641387.pdfIn PDF document text
    • http://wipababotuzuke.iblogger.org/palintest_pooltest_25_manual.pdfIn PDF document text
    • http://xogavuw.medianewsonline.com/speaking_skills_ielts.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/water_bottle_manufacturing_process.pdfIn PDF document text
    • http://rulamiji.onlinewebshop.net/igora_royal_e-1_how_to_use.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/204ab16c-ea9f-4463-a3f9-25418afc1a27/beget.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b4cbefd-64d0-4d05-aba6-961a98fa688f/20622557355.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/sojonezuvesokara.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/99783654403.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/fagojufomexasizufijojitef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2da6e861-0770-4068-bece-4b3d2a97c1d7/how_to_program_remote_rc122.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/92474913980.pdfIn PDF document text
    • http://jemibare.epizy.com/fedidifumamokus.pdfIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/37188082749.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_off0000f1e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E1 5828 bytes
SHA-256: f2099e74f0b76db9644131e2cae3ff8c98b03f07032e9b8bd63faa1e8f25ea62
font_01_sfnt_off000105b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B7 10848 bytes
SHA-256: c963de402e9af77c20928474d6659160bc7bb3900eba1d29c9e8018b55709ee2

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