Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8e823a6f60c3efb…

MALICIOUS

PDF

76.3 KB Created: 2021-02-23 17:49:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b03269e07883707128309a236efd7332 SHA-1: 049df203193e1547e37c45ff3336ecb42686f34f SHA-256: f8e823a6f60c3efb028a0c02b142fe50e32e684cc11133b9dc5fe93d99d05e49
126 Risk Score

Malware Insights

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

The sample is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains multiple embedded URLs, including one that points to a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The PDF structure and embedded content are consistent with attempts to disguise malicious links or content.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/wix?keyword=how+did+ancient+greece+influence+american+government+quizlet PDF link annotation
    • http://natiral.space/all_animal_sound_app_downloadk7s5d.pdfIn PDF document text
    • http://osmosiotzs.fun/44498673484gj1hu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372983/normal_5fe5a55288762.pdfIn PDF document text
    • http://zodoworusa.22web.org/52937483080.pdfIn PDF document text
    • http://grantmedica.ru/siwalutozanibanefivuselegb46l.pdfIn PDF document text
    • http://bettyloustintruckbbq.com/alfabeto_fonetico_espaol6uyss.pdfIn PDF document text
    • http://svoylend.xyz/color_crush_composition_plannerz5nc9.pdfIn PDF document text
    • http://lamenizabov.22web.org/lgebra_de_lie.pdfIn PDF document text
    • http://freds.space/wepevutepefomxfnt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382189/normal_6002c5b648f95.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/kotodur/3666681370.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/liralobagifewirarefe.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/77097211303.pdfIn PDF document text
    • http://jujabezemaluwe.rf.gd/ehsaas_sheera_jasvir_song_mp4.pdfIn PDF document text
    • http://milatosokalazer.epizy.com/the_case_for_a_creator_student_edition.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_off0000dca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA9 5452 bytes
SHA-256: d1c6eff9e7a5bbca023f7654b311f40931ea0a6d315d5e5de4e8a8fa03b40d39
font_01_sfnt_off0000ef38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF38 16244 bytes
SHA-256: 8f53a19e78d277167631b91dc032e7715325cd71b82f410e106345e63df1b850

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