Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2ee704d54b4ffbb…

MALICIOUS

PDF

87.3 KB Created: 2021-03-31 23:08:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 6f41408e38492e3cdaa6c75efad94e33 SHA-1: 3da42d8771eac0800137f1c91fa9caaf997cfe33 SHA-256: b2ee704d54b4ffbb7187c4f3872ebd751c14e55d9b64090e4bb2072eb4caaf42
134 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. It uses an invoice-themed 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
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://golowaki.ru/award?keyword=attestation+de+vente+telephone+pdf PDF link annotation
    • https://katozela.weebly.com/uploads/1/3/0/8/130874493/2588bf50871e.pdfIn PDF document text
    • http://fsbsiod.com/fotepokezigerusobofog6hr11.pdfIn PDF document text
    • http://snapchat-alert.com/free_online_grammar_games_for_6th_gradeshfr7.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • https://totijavefukaja.weebly.com/uploads/1/3/4/7/134705726/rovit.pdfIn PDF document text
    • https://nanewibogexuro.weebly.com/uploads/1/3/1/3/131382113/7f76d54dd.pdfIn PDF document text
    • http://fezufizibum.mypressonline.com/juselid.pdfIn PDF document text
    • http://sufevar.22web.org/61958869094.pdfIn PDF document text
    • https://bopugokux.weebly.com/uploads/1/3/4/9/134901566/giwusubepiw_lakeninuju_jonewanusodas.pdfIn PDF document text
    • http://stav-games.ru/video_er_for_instagram_repost_app_uptodownqwcfo.pdfIn PDF document text
    • http://kixurox.getenjoyment.net/rafagetax.pdfIn PDF document text
    • http://makamar.online/chalte_chalte_movie_full_song78x35.pdfIn PDF document text
    • http://ozalupa.space/cloud_computing_basic_interview_questions_and_answers9o9pq.pdfIn PDF document text
    • https://dinadexoliba.weebly.com/uploads/1/3/6/0/136091941/3431221.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vexabimumemig.atwebpages.com/mm_to_gauge_conversion_for_sheet_metal.pdfIn PDF document text
    • http://dukizovisepo.rf.gd/school_rules_worksheet.pdfIn PDF document text
    • http://lenawukefiraba.rf.gd/pamamizoduz.pdfIn PDF document text
    • http://wotekobadukabuz.rf.gd/which_bleaching_cream_is_the_best.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_off00011219.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11219 5084 bytes
SHA-256: 9d8a3c0cd67b5e2e0ebb518de9c9039657e9cc66041367228aab2b51422e86cb
font_01_sfnt_off0001236f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1236F 13492 bytes
SHA-256: d338119bc9af66a3c6368e4a9c4c2ce45cdfe78c0fec2185c141b16d8c84e29b