Malicious PDF — malware analysis report

Static analysis result for SHA-256 cece2dd62275dba2…

MALICIOUS

PDF

73.6 KB Created: 2021-05-17 20:32:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00830f11bd5903db70784fbfebeb99cf SHA-1: 74351c0e4c375f7944692425ae242057e3121992 SHA-256: cece2dd62275dba28014a389aab089d4272202cd9308c66c20be26858c22d3dd
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and a machine learning classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many pointing to PDF files hosted on various domains, suggesting a link farm or redirection mechanism. The document body, though heavily obfuscated, contains a search query for 'Walmart tires near me', which is likely a lure to disguise the malicious nature of the links. The presence of numerous external URIs and the PDF_SEO_LINK_FARM heuristic strongly suggest the document is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/strik?utm_term=walmart+tires+near+me+205%252F55r16
    • https://cdn.sqhk.co/buzaxelubot/d8pWl7N/86617852101.pdf
    • https://lutenowunag.weebly.com/uploads/1/3/4/6/134627800/7870967.pdf
    • https://cdn.sqhk.co/xenaporo/iehcfFR/us_park_police_salary_scale.pdf
    • https://nutolifawivu.weebly.com/uploads/1/3/1/4/131437776/7138454.pdf
    • https://cdn.sqhk.co/buzovegom/JhjFhhg/mezunokidamopotolunogubo.pdf
    • https://cdn.sqhk.co/zoluxoni/Tjiigio/57349966246.pdf
    • https://cdn.sqhk.co/lakuxezaj/r5g2uja/medabenawi.pdf
    • https://cdn.sqhk.co/kikutajaz/gs8Dijz/tamil_keyboard_for_android_apk_free_download.pdf
    • https://cdn.sqhk.co/kofuvufexo/VEjcjjl/hoosier_road_race_kart_tires.pdf
    • https://cdn.sqhk.co/rebabafa/hehchJG/23779884412.pdf
    • https://natatujefeni.weebly.com/uploads/1/3/1/6/131607075/tidifepexibomeditu.pdf
    • https://texifafotolatip.weebly.com/uploads/1/3/4/7/134764930/rimuv.pdf
    • https://cdn.sqhk.co/lixozimiz/Wgciaia/murem.pdf
    • https://cdn.sqhk.co/zokosofu/jbujijj/7729096012.pdf
    • https://cdn.sqhk.co/lizasizova/jbhcggv/jupetomozovugalulaj.pdf
    • https://cdn.sqhk.co/milevatomog/g4mEEHQ/41822346688.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jipowumat/chromatin_condenses_to_form_discrete_visible_chromosomes.pdf
    • https://s3.amazonaws.com/kotidox/navy_online_compliance_reporting_system.pdf
    • https://uploads.strikinglycdn.com/files/1fcb88c6-d7a1-4868-ad5a-c591d71f5753/jufeguwijitexatokul.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e067.bin
81defb879b4a2898b3b0ec01a48fe0568f727e6cae9f2b32a84421f1336f1d06		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE067 5484 bytes
font_01_sfnt_off0000f310.bin
56092cb35235ff67233837dff2e94117131ce47d74658b227c0d41a6f3ba0a90		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF310 11128 bytes

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