Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e1d52223e546332…

MALICIOUS

PDF

80.9 KB Created: 2021-03-28 06:20:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ef82d441c6eea2fd9bdfd01dedb9f69e SHA-1: dd8908d031aec3cb6e0d4af13cfff2c206b49526 SHA-256: 8e1d52223e546332a5844302ff775e4e97d879835e9bf1d2146be2b308d5e042
186 Risk Score

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://soxebez.ru/wix?keyword=magnus+chase+book+3+pdf+free+download+weebly PDF link annotation
    • https://cdn.sqhk.co/wiradimabid/eghjkhb/auto_response_facebook_marketplace.pdfIn PDF document text
    • https://cdn.sqhk.co/sumefixes/ajgjcHC/small_business_management_and_entrepreneurship_degree_jobs.pdfIn PDF document text
    • https://cdn.sqhk.co/nawamuzimosu/Rghijgg/guacamelee_super_trophy_guide.pdfIn PDF document text
    • http://tuzotumefakorok.scienceontheweb.net/californication_bass_transcription.pdfIn PDF document text
    • https://cdn.sqhk.co/baxilutifi/jgYwhb8/come_inserire_gli_stickers_su_whatsapp.pdfIn PDF document text
    • https://cdn.sqhk.co/wifavizen/EDOid1M/gmail_email_login_gmail_account.pdfIn PDF document text
    • https://cdn.sqhk.co/jotepomi/2ugeEFJ/65165701448.pdfIn PDF document text
    • https://cdn.sqhk.co/kotolodegag/jaiaAha/jezotuxewatibekejizux.pdfIn PDF document text
    • http://moxawunanenubop.sportsontheweb.net/73_74_amendment_act_in_english.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CtjdgtM/fast_money_halftime_report_cnbc_fix.pdfIn PDF document text
    • https://cdn.sqhk.co/ferudati/jBsgevE/26418679627.pdfIn PDF document text
    • https://cdn.sqhk.co/febapaji/bje6FIc/buwenolatinuzeraviso.pdfIn PDF document text
    • http://giwapozolaleg.mypressonline.com/60389631695.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/zamemigojat/wonedivigukimad.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/14220369361.pdfIn PDF document text
    • http://kopolug.myartsonline.com/44234271388.pdfIn PDF document text
    • http://dufobirufo.atwebpages.com/brief_publicitario_de_bimbo.pdfIn PDF document text
    • http://liraperuwuw.atwebpages.com/62108114807.pdfIn PDF document text
    • http://nowimirozox.atwebpages.com/poulan_pro_5020_chainsaw_spark_plug.pdfIn PDF document text
    • https://80b1f93a-fe74-4439-a81d-34814fa7a505.filesusr.com/ugd/e56fe2_0719a14c22304f24a8d1cfab4638fdb5.pdf?index=trueIn PDF document text
    • http://ruzofugeru.myartsonline.com/angularjs_viewer_demo.pdfIn PDF document text
    • https://35e1cc1d-5f6c-4a41-9b1b-b9ae8dddc97a.filesusr.com/ugd/351eee_69f6c6943a704a5f9a746bf06a340ef4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/how_to_reset_john_deere_service_reminder.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED21 3604 bytes
SHA-256: 40203865c3fb3cbae9ebdf2b38b5b586430e61ff9681149644f7eacc0100038c
font_01_sfnt_off0000fa01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA01 5984 bytes
SHA-256: 0885cad45df7024295c7b18380f010a27ae3c16a57afa877265b1c85788c6812
font_02_sfnt_off00010e81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E81 11268 bytes
SHA-256: 16ec137708e884ab561a82563bb4bbfdfe42dbefa07a3c4ee464d9350d499049