Malicious PDF — malware analysis report

Static analysis result for SHA-256 26fedec358250d4d…

MALICIOUS

PDF

77.5 KB Created: 2021-04-17 03:42:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9ee04af5ea1c27eba5d30f91738d8741 SHA-1: dc8acd76597248c33bd5b8d4af28772689a70e4b SHA-256: 26fedec358250d4d58b2101f3302730d483d97764764c66fb81c7e67e74498cc
156 Risk Score

Malware Insights

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

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 0.9960

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://crophysi.ru/strik?utm_term=oxford+history+of+the+united+states+next+book PDF link annotation
    • http://businesshelpservice.com/nezexadysdy.pdfIn PDF document text
    • http://taforojujutusig.mygamesonline.org/busonid_50_mcg_bula.pdfIn PDF document text
    • http://realwockyc.info/383829187009cyc2.pdfIn PDF document text
    • http://dazolovegom.mygamesonline.org/4_pics_1_word_level_2486.pdfIn PDF document text
    • http://lafutib.sportsontheweb.net/mobbing_cmo_sobrevivir_al_acoso_psicolgico_en_el_trabajo.pdfIn PDF document text
    • https://xowanejizaki.weebly.com/uploads/1/3/1/8/131871556/dulum.pdfIn PDF document text
    • https://dutebosolet.weebly.com/uploads/1/3/0/9/130969562/6246584.pdfIn PDF document text
    • http://derifupiwa.mypressonline.com/skewness_and_kurtosis_test_for_normality.pdfIn PDF document text
    • http://madewithsunshine.com/english_to_bengali_translation_dictionary_download8ng0l.pdfIn PDF document text
    • https://wikefazopikevi.weebly.com/uploads/1/3/4/7/134715570/8966681.pdfIn PDF document text
    • http://bagesopabiwub.scienceontheweb.net/15375418669.pdfIn PDF document text
    • http://leqqurint.online/92292616960w4s8a.pdfIn PDF document text
    • https://ginadilu.weebly.com/uploads/1/3/4/7/134768391/lupodefurajav_vebevenepobapo_wokevogajatuw.pdfIn PDF document text
    • https://xefofuzidadadaz.weebly.com/uploads/1/3/4/8/134876265/pilanuxobiwuz.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/posufij/folliculitis_decalvans_treatment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/gakamif.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/79006601017.pdfIn PDF document text
    • http://dilutibu.onlinewebshop.net/mumbai_map_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/water_and_fire_song.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/48068258726.pdfIn PDF document text
    • http://fedonefekipide.myartsonline.com/calvarial_bone_graft.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/67890988980.pdfIn PDF document text
    • http://purewowesajumu.myartsonline.com/52184875435.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/performance_testing_baseline_template.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/8th_grade_math_test_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/97986022433.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 8

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_off0000f289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF289 5364 bytes
SHA-256: 7583ceea80ca42f25fec55884d9d6d409b7c5cb8be5901e0a46fb5d9f3a4ad27
font_01_sfnt_off000104c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C9 10496 bytes
SHA-256: 602b639d6dc1a7d13519042e7e621a9af28e8febbc75dba67f48eac4f2ebce32

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