Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f1b3b32d1c6a60d…

MALICIOUS

PDF

75.9 KB Created: 2021-05-12 17:10:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: feda58fa72d1b71cdbfdc3d92b95ccab SHA-1: 118a773d06a7101dc791ee287a26ef5ddfd6d1b7 SHA-256: 0f1b3b32d1c6a60d419755c8bda5fb3e5c707914aa0ce9c1b5aff23857adbd12
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 0.9998

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://crophysi.ru/strik?utm_term=math+worksheets+4th+grade+addition PDF link annotation
    • http://tegubija.mypressonline.com/pasosabezopofakolupezanos.pdfIn PDF document text
    • http://xafopawiki.medianewsonline.com/runir_deux_en_un_seul.pdfIn PDF document text
    • https://cdn.sqhk.co/kepilujofeje/ljhqbjf/screen_recorder_and_video_recorder_for_windows_10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493905/normal_6015f38d653a5.pdfIn PDF document text
    • http://vopugixeroramox.medianewsonline.com/will_the_star_of_bethlehem_shine_on_december_21_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376105/normal_602ca2187b1b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375195/normal_5ff63611a9cce.pdfIn PDF document text
    • http://tuzirawejaw.mypressonline.com/ratafelutumuxeraduvanozen.pdfIn PDF document text
    • https://cdn.sqhk.co/dadirowuj/f9Jhc4Q/tejekudiger.pdfIn PDF document text
    • http://xatakafigudu.getenjoyment.net/princeton_review_mcat_login.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gorefoverotiw.epizy.com/ant_life_cycle_worksheet.pdfIn PDF document text
    • http://rotaduwifomol.rf.gd/xosatibesasetimavexe.pdfIn PDF document text
    • http://golofup.rf.gd/breakup_sad_shayari_wallpaper.pdfIn PDF document text
    • http://womawujun.atwebpages.com/convertidor_de_gramos_a_miligramos.pdfIn PDF document text
    • http://kufisidus.epizy.com/skullcandy_hesh_2_work_with_xbox_one.pdfIn PDF document text
    • http://zivonupawidam.atwebpages.com/muwugibagepome.pdfIn PDF document text
    • http://mazogatu.epizy.com/why_is_my_uniden_phone_not_ringing.pdfIn PDF document text
    • http://jagivaxo.rf.gd/luxomepiwew.pdfIn PDF document text
    • http://xugeseza.epizy.com/vuxego.pdfIn PDF document text
    • http://bupalim.atwebpages.com/54996669701.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_off0000ece4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE4 5304 bytes
SHA-256: 1deec2248fcee8eb0f3cc9df74d3a30420d5a2add5335476bce20f39c495858c
font_01_sfnt_off0000ff0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF0B 10184 bytes
SHA-256: d694f0fe9181dadb386029b8e888daba2372ff182debead67fd1e172996a103e

Open this report in the interactive analyzer, or submit your own file for analysis.