Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e0ccb7979c73345…

MALICIOUS

PDF

72.3 KB Created: 2021-02-19 15:30:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 879596e43ba5b7150fedd6e924097bf1 SHA-1: 2349de05132dca09f4a228e027a57799deb6075d SHA-256: 2e0ccb7979c7334514ef14f4e72498b779423dbd6c0e37bbf7ad67c8e25f6e5d
166 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. It uses a password-protected-archive lure. 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 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://jacksth.ru/strik?utm_term=adobe+premiere+pro+cc+2019+-+full+version+for+pc+-+lifetime+license PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4448332/normal_602dd597c2531.pdfIn PDF document text
    • http://nitezebana.iblogger.org/ansys_maxwell_rmxprt.pdfIn PDF document text
    • https://gepajalubawif.weebly.com/uploads/1/3/5/3/135326746/4b67dc2ea.pdfIn PDF document text
    • http://romomikas.22web.org/copy_editing_exercises_with_answers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499979/normal_5fdd3197bcde9.pdfIn PDF document text
    • https://dojunulopifo.weebly.com/uploads/1/3/4/4/134445836/8467099.pdfIn PDF document text
    • http://biduwupukipajov.22web.org/evowars._io_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374956/normal_6019cb3fdc910.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478402/normal_600a5d6869cba.pdfIn PDF document text
    • http://jutereli.iblogger.org/carbon_cycle_video_and_worksheet.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/dojivewobasuval/zulofobovusekuz.pdfIn PDF document text
    • http://visowad.epizy.com/finders_keepers_designs.pdfIn PDF document text
    • http://vonezilomobupir.rf.gd/47514486186.pdfIn PDF document text
    • http://karifopiti.epizy.com/bose_revolve_plus_owner_s_manual.pdfIn PDF document text
    • http://resodexapok.rf.gd/search_via_image_android.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/25942144435.pdfIn PDF document text
    • https://s3.amazonaws.com/nasitevu/53336856764.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_off0000dc0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC0A 5792 bytes
SHA-256: bf17ed6192c6fc4b2ebb003b5625d314430a58981ef70d3db70c04b48897297f
font_01_sfnt_off0000efbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBF 10288 bytes
SHA-256: 0064b04d24cb7b4db34e0c1fb17852592076f1ab5e026cfc3bb9009bb90ab124

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