Malicious PDF — malware analysis report

Static analysis result for SHA-256 0151e1590f63ca10…

MALICIOUS

PDF

85.3 KB Created: 2021-03-24 00:08:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 48ec2b4a4d4ce1606c4773a6d843213e SHA-1: 9b60500d366f65c6871995fb89fa9156225c1617 SHA-256: 0151e1590f63ca1041393c23d3fa812f8b5a60fc458865d1bff9041b3dc9372d
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with several pointing to suspicious or disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://seumenha.ru/strik?utm_term=remington+16+chainsaw PDF link annotation
    • http://akillidestekbasvuruformu.online/how_to_troubleshoot_compressor_in_a_refrigeratorel4no.pdfIn PDF document text
    • http://nout-sale.site/14228840299f7yf8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495391/normal_605795e69adc9.pdfIn PDF document text
    • http://tafugegajotu.mygamesonline.org/53034888736.pdfIn PDF document text
    • http://bukipumil.mypressonline.com/how_to_open_a_doro_phone.pdfIn PDF document text
    • http://rowomonug.mywebcommunity.org/basel_iii_regulations.pdfIn PDF document text
    • https://lewozokor.weebly.com/uploads/1/3/5/4/135400983/e5641f9.pdfIn PDF document text
    • http://helplnstagramcontact5087423.com/way_to_go_child_support_card_tnsauac.pdfIn PDF document text
    • http://pepariravifaza.getenjoyment.net/research_paper_format_template.pdfIn PDF document text
    • http://nepoxiduvilej.scienceontheweb.net/mafijevorutoxut.pdfIn PDF document text
    • https://suwudaxodorepe.weebly.com/uploads/1/3/4/8/134885248/eb02d.pdfIn PDF document text
    • http://tofotibuwul.sportsontheweb.net/74524018048.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448330/normal_6035b04d10a1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488141/normal_600d9651e297a.pdfIn PDF document text
    • http://sozolusi.iblogger.org/assistant_commandant_exam_form_2019.pdfIn PDF document text
    • http://meine-gebuhrenfrei.com/chainsaw_mill_planszwetn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377114/normal_60120f3e6dc5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376120/normal_5fd24f41e1621.pdfIn PDF document text
    • http://dawexefif.getenjoyment.net/demonstrative_adjectives_worksheets_4th_grade.pdfIn PDF document text
    • https://keninowe.weebly.com/uploads/1/3/4/6/134617270/mabufumuzabefis-makaziwavovaro.pdfIn PDF document text
    • http://puwinowelin.medianewsonline.com/cursos_de_ingles_basico.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://jajogagek.atwebpages.com/paradise_lost_book_9_themes.pdfIn PDF document text
    • http://womawujun.atwebpages.com/kumisipij.pdfIn PDF document text
    • http://puzexexaniledow.epizy.com/civics_question_answer_class_10th.pdfIn PDF document text
    • http://suwojib.rf.gd/wozufuteledajibititi.pdfIn PDF document text
    • http://femasusatatovet.epizy.com/google_chrome_standalone_filehippo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F3 5176 bytes
SHA-256: acc1dab85af6142863c33ef461e700870d549342c65f8f3d594deee3889f689f
font_01_sfnt_off0001127b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1127B 11576 bytes
SHA-256: 53a9721fd287aa8407810570b37bdd5c3621db5f4a62e7b85675c67ba63ea8ff
font_02_sfnt_off0001398d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1398D 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71