Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2e825ec7dea22de…

MALICIOUS

PDF

83.5 KB Created: 2021-03-04 04:01:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 878ee11fed67cc77bd33756950f7aa2c SHA-1: 15f64e20b4628027aea1bcadb23bd011db1295f7 SHA-256: f2e825ec7dea22de2445c9a1e484c7e2909f7dc1c0af3804ad39e1a10097dda3
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-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://vilenefex.ru/123?utm_term=playing+card+club+symbol PDF link annotation
    • https://cdn.sqhk.co/rapawaferew/jaxsRhf/diporutixumuwelilelubodex.pdfIn PDF document text
    • http://polypak.site/10185198315d1xq2.pdfIn PDF document text
    • http://xuwuvewisin.mypressonline.com/planet_fitness_pf_black_card_worth_it.pdfIn PDF document text
    • http://italiabeach.space/kiferebuserepoliwuf5kh3.pdfIn PDF document text
    • http://gipogup.sportsontheweb.net/83731353595.pdfIn PDF document text
    • http://ronifibofizet.medianewsonline.com/89976905076.pdfIn PDF document text
    • https://cdn.sqhk.co/moxinivo/ijXfhci/2755070634.pdfIn PDF document text
    • http://masito.space/php_for_beginners_2019tlu54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420906/normal_5fd776487174d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472763/normal_603f1975efe0c.pdfIn PDF document text
    • http://suwefazimim.medianewsonline.com/dsc_impassa_reset_master_code.pdfIn PDF document text
    • https://cdn.sqhk.co/zurefaxenov/qOrjihf/funaruwudavi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418786/normal_60208c3c62a27.pdfIn PDF document text
    • http://dotixomovi.sportsontheweb.net/50875661062.pdfIn PDF document text
    • https://cdn.sqhk.co/votezevon/bzrpUja/hot_videos_netflix_2020_new.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://supajiwa.myartsonline.com/nokupira.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/kojixawaviru.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/juggernaut_wars_guide.pdfIn PDF document text
    • http://donijexufenu.onlinewebshop.net/16464927531.pdfIn PDF document text
    • http://radiviwix.onlinewebshop.net/mifujumev.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/acrylic_sheet_thickness_for_signage.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_off0000f289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF289 5504 bytes
SHA-256: 6882b68fc631e807ef6ee03bf43c281b33585ef1ed7bad50f3e8c5ce1e7267ed
font_01_sfnt_off0001052f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1052F 11032 bytes
SHA-256: c10ed239d341f823690ad7465bc152101b08973011542ac730bce17fe2a6f7d9
font_02_sfnt_off00012b17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B17 16232 bytes
SHA-256: c2f1b8e27e4c5d1eb6694bcf999bed56489d599ed66a9b176e3ad865fa2ee921

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