Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0b18e1fec33bb92…

MALICIOUS

PDF

73.0 KB Created: 2021-03-14 15:03:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 2742622fd8a2b53c71515f28e7488e80 SHA-1: 5d29c715740d945e3f98c45ae5fddbeab036108c SHA-256: c0b18e1fec33bb92a67a5810edf8b438e25d316543db4c544202c6b7dc0a4b7c
134 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/award?keyword=current+affairs+2020+in+english+with+answers+pdf PDF link annotation
    • http://bewudewumit.sportsontheweb.net/critical_social_theory_and_the_end_of_work.pdfIn PDF document text
    • http://texifudosino.mygamesonline.org/gurekateza.pdfIn PDF document text
    • http://vugekowuzujed.scienceontheweb.net/poxudubezafevariseveluvo.pdfIn PDF document text
    • http://nepufikusugepa.iblogger.org/visajutide.pdfIn PDF document text
    • http://jidokove.scienceontheweb.net/calendar_2020_uganda.pdfIn PDF document text
    • http://penafur.scienceontheweb.net/kitirufeterovale.pdfIn PDF document text
    • http://zegobudipaju.mywebcommunity.org/winakozunimiputugova.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pubitawiwinas.rf.gd/how_to_thank_someone_for_taking_care_of_you.pdfIn PDF document text
    • http://kasegek.rf.gd/8703376888.pdfIn PDF document text
    • http://volozixoxogibe.rf.gd/resesidar.pdfIn PDF document text
    • http://kemesuxaw.myartsonline.com/nazm_hikmetin_iir_anlay.pdfIn PDF document text
    • http://gofirog.epizy.com/dukub.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/mathswatch_answers_dividing_fractions.pdfIn PDF document text
    • http://wolobugoxew.myartsonline.com/baby_bjorn_potty_chair_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fd33f5e-4d97-4f96-b54a-91b1c2ed0129/giwikuralimumagajej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83ca3c28-fbfc-45ad-802a-958432f63cc0/verizon_fios_remote_doesnt_control_volume_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/47542496714.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/universit_besanon_formation.pdfIn PDF document text
    • https://s3.amazonaws.com/vinivuxo/limping_child_guidelines_nice.pdfIn PDF document text
    • http://jirovod.rf.gd/alaska_truck_simulator_apk.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_off0000ddf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF4 5572 bytes
SHA-256: 1fb493ad890005c62da7d3a8dacda0db6bc561db9dab9597362b2d052c413cf9
font_01_sfnt_off0000f0f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F3 11148 bytes
SHA-256: 40d3cbe2af2095ead7093cb5a62004e012e852cde39cf639a9cfa1594698e22b

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