Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0b00baa180543d1…

MALICIOUS

PDF

102.2 KB Created: 2021-03-19 22:46:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: e49f9651a08e223b237a1e4af0c4c180 SHA-1: 7839f1595fb44dc65f6a913c5382771af1e0e162 SHA-256: c0b00baa180543d1ad632eb71fc1236f72d119e4d8cc7ffc545637f82c37dd82
156 Risk Score

Malware Insights

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

The PDF document contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files. The primary URL, https://bologen.ru/strik, suggests a phishing or malicious redirection attempt. While no scripts were explicitly extracted, the nature of the link farm and the ML classification strongly indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/strik?utm_term=twilight+eclipse+edward+vs+victoria PDF link annotation
    • https://mufuxavezefajox.weebly.com/uploads/1/3/4/4/134497947/611ad06c2ce8.pdfIn PDF document text
    • https://lugiwitowux.weebly.com/uploads/1/3/4/6/134679166/6796597.pdfIn PDF document text
    • http://lnstagramsecurity.net/aprender_ingles_onlinelfhoq.pdfIn PDF document text
    • http://5-euro.info/bible_trivia_questions_and_answers_with_scripture_referencesr1ncv.pdfIn PDF document text
    • https://tuxatijofewimem.weebly.com/uploads/1/3/4/6/134686538/6d5677031e0156.pdfIn PDF document text
    • http://latuha.com/33434464159earmn.pdfIn PDF document text
    • https://mowolonob.weebly.com/uploads/1/3/4/8/134874237/3055564.pdfIn PDF document text
    • https://sixobeludid.weebly.com/uploads/1/3/5/2/135298518/0fdac31c76.pdfIn PDF document text
    • https://xagapetudiza.weebly.com/uploads/1/3/4/6/134686513/8998000.pdfIn PDF document text
    • https://latavulepa.weebly.com/uploads/1/3/4/4/134461708/lemexiku_fezovejujedabe_rodogigabisod.pdfIn PDF document text
    • https://wugabatove.weebly.com/uploads/1/3/5/3/135318753/9231228.pdfIn PDF document text
    • https://zewabezasakaru.weebly.com/uploads/1/3/4/5/134593707/pemozos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://batogegimuwew.rf.gd/badebufo.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/52445332860.pdfIn PDF document text
    • https://s3.amazonaws.com/somisilegex/jupagedisaruputizuzadofo.pdfIn PDF document text
    • http://fovuwikotunepam.rf.gd/tetigaxewuzegolowor.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/calligraphy_brushes_illustrator_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/evidence_of_evolution_answer_key_biology.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/audacity_apk_free_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/disorders_of_digestive_system_in_humans.pdfIn PDF document text
    • http://wumugaronekupaz.rf.gd/15092617827.pdfIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/lavap.pdfIn PDF document text
    • http://gisunomadipoxas.epizy.com/13620867661.pdfIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/risk_assessment_template_for_running_event.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/18031203758.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_off00015184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15184 5436 bytes
SHA-256: 30e498d71cefcca454039f4017c30d9255a92377006fa119e1c943d1bb925058
font_01_sfnt_off00016417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16417 11488 bytes
SHA-256: 3fca20cbebeadb32ac887de2d2f4bbf89d6a4187789f0c7e8b7501157002fae4

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