Malicious PDF — malware analysis report

Static analysis result for SHA-256 6081e55d3222c7c3…

MALICIOUS

PDF

80.0 KB Created: 2021-03-22 19:46:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6aee12dabe72487276691631657912e2 SHA-1: 5e3944719ffee9ab5cfb8923658c6dd42133ab7b SHA-256: 6081e55d3222c7c3707b3dc3ee89c16b94e2fdcfabdbb997494cdece72250821
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://maypoin.ru/strik?utm_term=how+to+turn+ratios+into+decimals PDF link annotation
    • http://copyright-security-ig.com/84245957472ym7xw.pdfIn PDF document text
    • http://mavitrade.com/fasciolopsis_buski_nediryafky.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383791/normal_601dbcb311cc7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408009/normal_6046c11ed5f93.pdfIn PDF document text
    • http://pearhaidhr.fun/jakedunugufurcu2tt.pdfIn PDF document text
    • http://esplus.pro/96832508719aayo5.pdfIn PDF document text
    • http://wejnpowk.space/how_to_check_pandemic_ebt_balanceusnl5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414164/normal_5fcd5db5034d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413117/normal_60395acf439d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367299/normal_60543ce84a089.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/71603a35-4841-4bcc-95c0-0774f6448b10/can_you_air_fry_wings_in_a_convection_oven.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e514f09-ffe7-498c-90fa-27ac9cb390c0/is_it_smart_to_invest_in_penny_stocks.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/wedding_budget_excel_spreadsheet_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e12a991e-aa14-4f95-b219-9509bce6355b/powarejerulirewowi.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/piwokibowolavanoloro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aef704f1-3a96-433f-a26c-0922810648e2/what_hunger_games_catching_fire_character_are_you.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6aa3f49-7792-405a-b0f5-8f8c5333d724/60105447150.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/baul_video_song_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2397db0-11ee-4bce-9908-3bb761cd73ab/what_is_a_freshman_seminar_class_in_college.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edffacce-1a13-4584-8ecd-7bac7021500d/batilijusisoregi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f7f7bab-d2da-4dc1-9897-b54a99324c96/dias_feriados_federales_2021_puerto_rico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fdacd34-ab3f-4f0b-9e26-99df6ff1f10c/lasko_tower_fan_2551_manual.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_off0000fa2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2B 5140 bytes
SHA-256: 77494d5781a41f72357e415b7c4aab6c772a69107ffa89349efd92d508bfeb01
font_01_sfnt_off00010b9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B9C 11612 bytes
SHA-256: 3f11ca43eac7da019788753abdf2d86d156cb32a45fe0370c38ddcf5a81600cd

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