Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b50e9fc9f2521c8…

MALICIOUS

PDF

80.6 KB Created: 2021-04-01 10:32:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b09fa99acf39e612ae37828ed47dc3ba SHA-1: 5895adede7431bbe2927cd8b2d4b8a9f66a1c61e SHA-256: 7b50e9fc9f2521c88e32aef37bd1c0810501b78673bd208437242f4298f069bb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gimoguvi.ru/123?utm_term=have+has+had+worksheets+for+grade+2 PDF link annotation
    • https://cdn.sqhk.co/fiseguvugele/hhgidjh/63831173815.pdfIn PDF document text
    • http://xovuwowim.mypressonline.com/50659160618.pdfIn PDF document text
    • http://kaboliwup.mypressonline.com/answer_to_job_carl_jung.pdfIn PDF document text
    • http://zereteleriw.getenjoyment.net/rumofeginodepos.pdfIn PDF document text
    • https://cdn.sqhk.co/pinuwinepasu/bIhbhhA/junokuniwulinafijiki.pdfIn PDF document text
    • http://wapividazofar.scienceontheweb.net/69928756058.pdfIn PDF document text
    • http://gemajelibetojup.scienceontheweb.net/78838300162.pdfIn PDF document text
    • https://cdn.sqhk.co/neseleko/jjiENij/learn_thai_alphabet_writing_worksheets.pdfIn PDF document text
    • https://cdn.sqhk.co/fedovipawe/jgimjjo/kukebipukazip.pdfIn PDF document text
    • https://cdn.sqhk.co/nobixapo/11gfiaS/fefugorifijonipenavanug.pdfIn PDF document text
    • http://xariketixagat.mypressonline.com/clasificacion_de_las_cuentas_capital.pdfIn PDF document text
    • https://cdn.sqhk.co/gazegarov/fgdhgQr/nijolow.pdfIn PDF document text
    • https://cdn.sqhk.co/wozobifanu/fzid2jj/billionaire_capitalist_tycoon_mod_apk_latest_version.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/sojenozap/history_of_the_united_states_navy.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/hallelujah_piano.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/hp_probook_430_g6_notebook_pc_datasheet.pdfIn PDF document text
    • http://wonanikapudidak.atwebpages.com/telesis_tmp1700.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/kaxetajukava.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/46135304755.pdfIn PDF document text
    • http://pawuzax.onlinewebshop.net/82905886889.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/newton_s_laws_worksheet_elementary.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/wujavivixajumugemitel.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

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAB 5444 bytes
SHA-256: 6b5bfd297c3f427e3d31022037e878ee29df882fbef2cd2a04823f9c4c4c49c5
font_01_sfnt_off00010e45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E45 11760 bytes
SHA-256: 159bea8bb2bf86f12412691cea99bd5f34b54c25049f08cdbe8f03ba0ee23ed9

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