Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecaa4b85037724ce…

MALICIOUS

PDF

96.5 KB Created: 2021-03-02 12:24:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b2db2803bcc76905d477806518cfc108 SHA-1: 9f3eca3baaeacfc2888f80b2d9940a027ba6af56 SHA-256: ecaa4b85037724cedb86aac062a0a36de1d62582211bc474c10dfdb6f407e00c
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 0.9996

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 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://xezojetit.ru/wix?keyword=final+fantasy+strategy+guide+mega+pack PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393208/normal_5fd819d14f2fc.pdfIn PDF document text
    • https://cdn.sqhk.co/momewoziwoge/gjhiheF/how_to_play_black_magic_woman_on_piano.pdfIn PDF document text
    • https://cdn.sqhk.co/kuretunaba/hhgOvhb/unity_2d_shooter_game_tutorial.pdfIn PDF document text
    • https://bokakarepexopo.weebly.com/uploads/1/3/4/7/134750167/5099959.pdfIn PDF document text
    • https://cdn.sqhk.co/nogawevorus/ciicjiW/electrician_apprentice_salary_2019_california.pdfIn PDF document text
    • http://totalcreditreport.info/11615003850ru912.pdfIn PDF document text
    • http://wapividazofar.scienceontheweb.net/94817820693.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412909/normal_5feb5cd6efc7d.pdfIn PDF document text
    • http://fejukoturig.medianewsonline.com/samsung_front_load_washer_not_draining_or_spinning.pdfIn PDF document text
    • https://ximapufem.weebly.com/uploads/1/3/1/4/131437784/luwevuvipusujaxadar.pdfIn PDF document text
    • http://daniele.store/frp_bypass_apk_samsung_pangush3ry.pdfIn PDF document text
    • http://gakawisogafuga.mygamesonline.org/is_hp_officejet_5740_an_inkjet_printer.pdfIn PDF document text
    • http://rastet-malysh.ru/the_secret_sharer_theme_analysis5xdns.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496165/normal_5fd33a054a715.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366350/normal_602105b0e351d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393644/normal_5fd830406cef1.pdfIn PDF document text
    • https://gadudomarun.weebly.com/uploads/1/3/4/7/134705140/fufobogurotol.pdfIn PDF document text
    • http://makebugobiwuka.mypressonline.com/luvekojigo.pdfIn PDF document text
    • https://belujewirozem.weebly.com/uploads/1/3/2/6/132681559/jinobenoperorevo.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/devuxuzejozam/vijigagetu.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/aarambam_movie_in_kutty_movies.pdfIn PDF document text
    • https://s3.amazonaws.com/bamepofewalada/49669495479.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_off00013adc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ADC 5596 bytes
SHA-256: c3edeb718e5b603d9b0e23c4e35d4785b765e0a67103512773f55758c4c4be2e
font_01_sfnt_off00014de6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DE6 11280 bytes
SHA-256: 1b0bcb5e30f93162a2c574cf1a6ac862cb4e9696bc15ad1e2205cde9ba532335

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