Malicious PDF — malware analysis report

Static analysis result for SHA-256 64e6f2d436900c92…

MALICIOUS

PDF

68.1 KB Created: 2021-02-20 07:34:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ae2ce229bd2d860e2d2e110a348d26b4 SHA-1: 91e31327f7f2897920018b4cea91615e7b758cc5 SHA-256: 64e6f2d436900c920ebd740b6b4653901f0aa45e35d4e93561bb98cd288cdfae
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 0.9998

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 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/123?utm_term=flir+c2+camera+for+sale PDF link annotation
    • http://sidodawoleze.iblogger.org/zoburagobipanunaremox.pdfIn PDF document text
    • http://rifikelatukuw.iblogger.org/lightroom_cc_alternative_android.pdfIn PDF document text
    • https://cdn.sqhk.co/tamoravuwera/ymfieif/vejomoz.pdfIn PDF document text
    • https://cdn.sqhk.co/pefisemise/gjchfhh/katekyo_hitman_reborn_english_dub_watch_online.pdfIn PDF document text
    • http://wogamilip.iblogger.org/benchmarking_adalah.pdfIn PDF document text
    • http://nubilejoso.iblogger.org/pevijogifalazuwekusu.pdfIn PDF document text
    • https://sorawujij.weebly.com/uploads/1/3/4/6/134671526/37aefe5fe86e427.pdfIn PDF document text
    • https://zatibuvox.weebly.com/uploads/1/3/0/7/130738619/sazenuzil_patos_gires.pdfIn PDF document text
    • https://xumizobizuzu.weebly.com/uploads/1/3/4/6/134688834/283a37ef142.pdfIn PDF document text
    • https://tunimesepet.weebly.com/uploads/1/3/1/4/131455680/a9ccc2b2.pdfIn PDF document text
    • http://pesale.pro/51698864716c4k5h.pdfIn PDF document text
    • http://copyrightprivacy.site/nubegekawarujewutapaa0pmw.pdfIn PDF document text
    • http://kagifosotumaden.iblogger.org/gexosuzerifipulezu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://guvipum.epizy.com/abacus_primary_school_wickford_ofsted_report.pdfIn PDF document text
    • http://zasujofimak.epizy.com/letter_worksheets_for_preschool.pdfIn PDF document text
    • http://ramedilasu.rf.gd/viruwivedadakuwuk.pdfIn PDF document text
    • http://turijebudeta.rf.gd/fleckney_primary_school_ofsted_report.pdfIn PDF document text
    • http://wesovipimamino.epizy.com/3961555749.pdfIn PDF document text
    • http://wolidile.rf.gd/how_much_is_supply_chain_management_course.pdfIn PDF document text
    • http://vomogowejupilu.rf.gd/manual_of_cardiac_surgery_instruments.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_off0000cb5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB5A 5116 bytes
SHA-256: 137341736e87a885fa4fde8abb92de84fc45c04226c26dea294434ea6afdab71
font_01_sfnt_off0000dcab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCAB 11352 bytes
SHA-256: d11f65ce64d7719b52664c84f3630b57cd2b82271ab6bb35fb7de0737ab9870a

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