Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e49523fd014391c…

MALICIOUS

PDF

86.0 KB Created: 2021-05-20 02:14:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5b9ab45f1496741939e735ad139ab5db SHA-1: b0d253fdd1696bc7a3cc56560339dbe043ec7748 SHA-256: 8e49523fd014391c4e37a40647022b42f568639e422ecbdd72fcc1d5c44fc76a
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/strik?utm_term=how+to+get+a+free+membership+on+prodigy+2021 PDF link annotation
    • https://wiwojuzikog.weebly.com/uploads/1/3/6/0/136050554/8779559.pdfIn PDF document text
    • https://wexapifunoru.weebly.com/uploads/1/3/4/7/134715363/8179302.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381551/normal_602c90c98e954.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416938/normal_5fd7628142abd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488092/normal_5fe3d5e22523a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370309/normal_601bb51025d25.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454430/normal_5fe23bb39c7af.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/matogapibelifiv/muscle_gain_workout_plan_at_home.pdfIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/vibevivinudorakibi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0eedb03-127f-4266-a4c8-fad2297638f9/fodebajaxonovodadifamuluw.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/indemnity_form_template_personal_training.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/diet_chart_during_pregnancy_month_by_month.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dd43a04-bc36-426c-bca4-6de8e6ff176c/how_to_offer_salatul_istikhara.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb247f19-28d9-462b-97e3-1532509cb628/v07_smart_wristband_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/054c9189-eae1-496f-8839-a4eb0adb6ab5/54967887983.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86f2e4f0-f183-4e0c-b884-66f85b928d48/zamud.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/certificado_de_origen_mexico_japon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39a1f7ba-05c1-4ffb-88de-b84d58befd00/51063541055.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de803aec-b6d7-49ba-bf37-f2a61e57f069/18192150226.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e59b9267-0ec1-46d5-840d-88860423eaf5/pokemon_red_blue_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93b43a7a-58fb-4a29-a850-30d867117602/tfs_2015_requirements_sql_server.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF392 6044 bytes
SHA-256: 23d8163d053bfa1ce2074395c0ce5db2d8d9468732d51a8bee0fecb2e7547474
font_01_sfnt_off0001081c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1081C 11432 bytes
SHA-256: a6fca0fb2857117e8a50c93f0a234c130d8f618d0cbcb62826c14d0a80d1d74a
font_02_sfnt_off00012f4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F4A 17112 bytes
SHA-256: f9dc15b9e7e1a45eeec377706f6e9859ce73b6054018bdf95ecdbdcfaa16ab0e

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