Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6bae7865b96e4d9…

MALICIOUS

PDF

81.8 KB Created: 2021-05-08 07:02:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a183a69ee1886f5baafa527a0b2ea45c SHA-1: 10d0e21e2a6f5930bb8bae2c95a0a953023978ca SHA-256: e6bae7865b96e4d90f95bdbb1f483ec727bce4af064e4d6f18ec5b7ca720ec7e
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 0.9996

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 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://seumenha.ru/strik?utm_term=apollo+110cc+oil+capacity PDF link annotation
    • https://puwoposujol.weebly.com/uploads/1/3/0/9/130969317/9274029.pdfIn PDF document text
    • https://refapezi.weebly.com/uploads/1/3/4/9/134904673/6490e85120ed2.pdfIn PDF document text
    • https://lofivate.weebly.com/uploads/1/3/4/3/134307733/eb96ad9e5c.pdfIn PDF document text
    • https://tezifotunojoke.weebly.com/uploads/1/3/0/7/130776805/rafativilavap.pdfIn PDF document text
    • https://jajipovel.weebly.com/uploads/1/3/4/5/134527293/gatilozu.pdfIn PDF document text
    • https://bokasopuvozanib.weebly.com/uploads/1/3/4/3/134319525/1778649.pdfIn PDF document text
    • https://guduzuzej.weebly.com/uploads/1/3/1/6/131606672/birobavuga.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/1b32e00c-5a07-4a22-bf0e-1377076c55e7/evenflo_tribute_lx_convertible_car_seat_recall.pdfIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/maharashtra_bed_cet_2018_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/cisco_linksys_e1200_setup_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4768cf90-f88b-4d44-b9e6-ef313aafd0b4/what_are_the_four_main_phases_of_mitosis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41a57df2-fefa-4aba-a7b0-79c5018414ec/graco_click_connect_35_travel_system_jogger.pdfIn PDF document text
    • https://s3.amazonaws.com/zodererezuzuxi/wpf_binding_to_element_name_in_datatemplate.pdfIn PDF document text
    • https://s3.amazonaws.com/vukujidor/bangladesh_railway_circular_application_form.pdfIn PDF document text
    • http://mirafezonoviluf.rf.gd/how_to_access_a_coroners_report_uk.pdfIn PDF document text
    • http://kegonen.rf.gd/anatomie_de_l_appareil_digestif_des_ruminants.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/getasitokenobu.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/flinnprep_ap_chem_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08308dcd-3bba-45c0-af0e-79ca67d451d8/ninunupedulasivonimozaxeb.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0F 2960 bytes
SHA-256: 495dc75d95a6a6f45ac0640accda880cdd7226211fb355277ff836c691f61857
font_01_sfnt_off0000f47d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47D 4500 bytes
SHA-256: e22d1f02a6766299220757dd41b2ae88757063aa82a0e18f331755a939ee5bee
font_02_sfnt_off000103ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103CE 11200 bytes
SHA-256: ef042f795f16f48b8e6343a175680881724691f25fcc89cdd964309f9061be5f
font_03_sfnt_off000129f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129F9 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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