Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c0ff998f07aee4a…

MALICIOUS

PDF

76.9 KB Created: 2021-05-11 23:40:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4e1285bb29a1bf72b8b9c655bf8ebb62 SHA-1: caadfbef6e87bda0b14ca907e973307df4312249 SHA-256: 7c0ff998f07aee4abfb21344bcaff91f747d14b28bc423f3cafbd2501b1055ef
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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 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://baarspo.ru/strik?utm_term=how+to+fold+confidence+fitness+treadmill PDF link annotation
    • https://tenagudewujuga.weebly.com/uploads/1/3/1/1/131164273/7975244.pdfIn PDF document text
    • https://xepebujusu.weebly.com/uploads/1/3/4/3/134319702/8905293.pdfIn PDF document text
    • http://mukosejak.iblogger.org/blank_business_card_template_photoshop_free.pdfIn PDF document text
    • http://jibesikore.iblogger.org/interstitial_lung_disease_guidelines_2015.pdfIn PDF document text
    • https://voliguxuzewiwa.weebly.com/uploads/1/3/4/7/134762967/davaguturir_fikapofomawuzex_xukesinob_beradoso.pdfIn PDF document text
    • https://nimivakovi.weebly.com/uploads/1/3/2/3/132302999/63643.pdfIn PDF document text
    • https://raxagipob.weebly.com/uploads/1/3/4/8/134883443/beluwegafigugekekoxu.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/zukogi/how_to_reset_fitbit_charge_2_hr_to_factory_settings.pdfIn PDF document text
    • https://s3.amazonaws.com/benuka/35192645520.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b944c9d9-46c2-4877-80b8-9efd8677ed92/what_does_any_mean_in_speedrunning.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/handwriting_practice_worksheets_for_grade_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/553ace8a-38af-495f-bde1-85ccfcc7b990/how_to_turn_on_pilot_light_on_bryant_furnace.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/896e184d-f879-4fe6-a5e9-58c299810da2/nortel_phone_system_programming_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/45686432397.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/29558963448.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f37766ad-75f3-4b3b-8986-e75aa3cab301/how_to_cook_cube_steak_in_power_pressure_cooker_xl.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/araluva_hoovugale_song_karaoke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5e34c19-d31f-4cf7-ade1-a06f60ee390b/14730387333.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/epson_m244a_print_configuration.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6435d1f6-3303-4d89-bc08-8728dd5a274c/dia_20_de_novembro__feriado_em_que_cidades.pdfIn PDF document text
    • http://fezabum.rf.gd/93602888142.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_off0000eea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA8 5220 bytes
SHA-256: cfac4e40d0516f38e218238b5ac5ace3c529cd573ec056a3263f9090c13eeeca
font_01_sfnt_off00010065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10065 10720 bytes
SHA-256: 59e680d68127c910b6971d2a0540574be189559300f0b0f118f684230c0580ee

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