Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c0dc626b6285c2d…

MALICIOUS

PDF

74.7 KB Created: 2021-04-29 03:59:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: a37d6e83ddc2f7b45d6c0053abbddd11 SHA-1: 13153ac3d6cfa975a562e71878f445b68477ea71 SHA-256: 0c0dc626b6285c2d1f212caf55e3f1f08abd856438c99f055ad19dcd08f9187c
126 Risk Score

Malware Insights

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

The file is a PDF document that contains numerous embedded URLs, many of which point to disposable hosting or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this, highlighting the use of external URIs and a link farm strategy. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/strik?utm_term=english+speaking+online+classes+app PDF link annotation
    • http://ronenepe.22web.org/wegigeba.pdfIn PDF document text
    • https://sumulepali.weebly.com/uploads/1/3/4/8/134882140/e407df2.pdfIn PDF document text
    • http://helpverifybadges.com/how_to_draw_a_face_step_by_step_tutorialv784c.pdfIn PDF document text
    • http://d2-club.ru/free_printable_math_worksheets_for_2nd_grade_word_problemsgaynv.pdfIn PDF document text
    • http://zawisemuw.iblogger.org/abc_of_electrical_engineering_free_download.pdfIn PDF document text
    • http://espaceabonnes.com/terokexepujabone02ri.pdfIn PDF document text
    • http://nubuweso.iblogger.org/jodhaa_akbar_tamil_hd_video_songs.pdfIn PDF document text
    • http://nopisodozig.66ghz.com/5995218013.pdfIn PDF document text
    • http://dirtygirl.fun/english_grammar_test_online_free_with_answers7pe2k.pdfIn PDF document text
    • https://galesarenad.weebly.com/uploads/1/3/4/3/134380117/rozuwilerivikapunu.pdfIn PDF document text
    • https://balolemarivapi.weebly.com/uploads/1/3/5/3/135309218/tukekixiliwu_jotosojelewigum_wipititupuveti.pdfIn PDF document text
    • http://rabowodof.iblogger.org/new_dan_brown_books_robert_langdon.pdfIn PDF document text
    • http://eroganoficial.site/usps_mdd_scanner_manualb4vii.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gevotuwelu.rf.gd/cedulas_de_auditoria_formatos.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/26837068495.pdfIn PDF document text
    • http://bovudavibivutu.epizy.com/fringe_benefits_definition.pdfIn PDF document text
    • http://dizutobasuxolom.epizy.com/latex_template_cornell_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/fowifoduxisoguji.pdfIn PDF document text
    • http://dunupilopun.epizy.com/61409919615.pdfIn PDF document text
    • https://69a21580-3c80-4f81-8097-1ec0bc18215d.filesusr.com/ugd/bd7df1_572a74d2e26d4b91ab29b137140c31c5.pdf?index=trueIn PDF document text
    • https://ddb1515c-011f-4d6c-9a6c-b305a2039a85.filesusr.com/ugd/477ac5_1e7ad2b445c8489780c63cd473d61a3d.pdf?index=trueIn 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_off0000e95b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE95B 5120 bytes
SHA-256: dafd8e70989cc2568432832fdb321c57295e55e05e2ee6691ea000271d6c5c12
font_01_sfnt_off0000fad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD2 10212 bytes
SHA-256: 95cf749db7f0b35d01a0eda2f3b033778477cfc15ef104d8eb4eb54299bc7ff2

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