Malicious PDF — malware analysis report

Static analysis result for SHA-256 42a5310998846570…

MALICIOUS

PDF

74.8 KB Created: 2021-04-01 20:41:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 6e6b1b8e3bc6191c1d1bc27d483a941f SHA-1: b739d572c52edcd028dc601691626bf907595f19 SHA-256: 42a5310998846570cdcc274e1ac916f652ebb8ffb96ae911423c288962538b2c
136 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing lure, specifically using an image to redirect users to a malicious URL. The ML classifier and ClamAV detection strongly suggest malicious intent. The primary URL identified, 'https://fokemale.ru/strik?utm_term=the+genie+within+your+subconscious+mind+audiobook', appears to be part of a phishing campaign designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://fokemale.ru/strik?utm_term=the+genie+within+your+subconscious+mind+audiobook PDF link annotation
    • http://ellmax-site.xyz/wahl_beard_trimmer_targetki6k9.pdfIn PDF document text
    • http://podarokinsta.online/the_asphalt_handbookd5j1m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383138/normal_60556420abddb.pdfIn PDF document text
    • http://daxavepevepa.mypressonline.com/microplastics_in_the_ocean.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374374/normal_603d72196d59f.pdfIn PDF document text
    • http://lnstagramverifiedsbadgeform.com/rogivikivevolukaxodat9s2w.pdfIn PDF document text
    • http://liteponezugom.22web.org/lavilawowimud.pdfIn PDF document text
    • http://rozewevojalel.sportsontheweb.net/casio_protrek_prg_80t_titanium_triple_sensor.pdfIn PDF document text
    • http://nigasheff.xyz/mexican_water_glass_musicj37kc.pdfIn PDF document text
    • http://ens-pictures.ru/completing_the_square_word_problems_worksheetosgfs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450634/normal_603fd5b2af8d8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425912/normal_6003f53c62263.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421768/normal_604f652b96d0c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sulosaseg.rf.gd/o_que__agnosticismo.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/flowers_for_algernon_summary_progress_report_13.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/active_learning_template_system_disorder_preeclampsia.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/foolproof_module_8_test_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/ludipaxasosazuwud.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/diseo_de_amplificadores_de_potencia_de_audio_pearson.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/impostazioni_aruba_mail_android.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/63398796423.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/100-200_number_chart_printable.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_off0000e51e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE51E 5668 bytes
SHA-256: 2bec5b93404b29605892b8c73eae2e2c9cdb9f046368ee87c0c8153ec1495ff6
font_01_sfnt_off0000f852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF852 10960 bytes
SHA-256: 523a2e1b465eb104f20deb568fac0b3060f730195347e219f405eaa17b327b29