Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd6e865d3e44d3cd…

MALICIOUS

PDF

91.1 KB Created: 2021-05-09 02:26:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: db199ed352a3fd15c56290d5047e9bb9 SHA-1: 1ddf62c755af911696df1bc5efc14466836b9fcc SHA-256: cd6e865d3e44d3cdff2de794493d3202b002cbd0df139b4a0eab12cc45ce3f22
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, with a primary suspicious URL pointing to 'soxebez.ru'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of link farming on disposable hosting, suggesting a malicious intent to obscure the true destination or host multiple lures. ClamAV detection and ML classification strongly indicate maliciousness, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://soxebez.ru/strik?utm_term=us+army+reserve+units+in+california PDF link annotation
    • http://mibajisokawetu.iblogger.org/schlage_keypad_door_lock_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/xavaxonad/ejegdzb/strike_fighters_mod_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/vipikunowi/gu0ifkL/twisterium_music_free_download.pdfIn PDF document text
    • http://organicnu.info/90691852400a703e.pdfIn PDF document text
    • http://zuxenegobepejij.22web.org/class_11_ncert_biology_book_download.pdfIn PDF document text
    • http://teagreen.space/fajabubelolodejuwuh70uq.pdfIn PDF document text
    • https://cdn.sqhk.co/fiwojosop/igeib3p/42966154496.pdfIn PDF document text
    • https://cdn.sqhk.co/pigevikuwi/gjgcmhb/acrylic_nails_shapes_coffin.pdfIn PDF document text
    • https://cdn.sqhk.co/guvevifowo/hfA3haM/wasinevapixazopadusuxex.pdfIn PDF document text
    • http://proita.fun/82189502879nuvj0.pdfIn PDF document text
    • https://cdn.sqhk.co/goluxewimabu/GKjghdC/86234699964.pdfIn PDF document text
    • http://kubidojizuw.22web.org/simple_compound_and_complex_sentences_quiz_with_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/gchdjaG/lolegafofapolad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dozopum.rf.gd/48345177764.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/604b419c-a143-410c-b42a-eac40eac0bd6/16404902022.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca974810-8263-4fcc-813f-20e3277af0d6/sevutusovopedupapin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c86581a-60ad-45b8-b161-db315a7f2378/pogozodebijuduralefewe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e0fd1fc-c3be-46ff-9674-0f08d8f1517b/15767908085.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61808745-ca0f-412a-bb1d-97189a27872c/honda_fit_2007_for_sale_in_sri_lanka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2546b91-4936-4468-a15b-f74e89b092fc/15453234607.pdfIn PDF document text
    • http://zubidoziradep.rf.gd/sm-t230_change_battery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a105e15e-35d8-4dd5-ace6-3dcf5c4c3124/handy_stitch_instructions_en_franais.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df5fabed-6983-430b-8040-57e52d976bff/the_piercing_bible_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7edfb8f2-b974-4ab3-b6e4-1ce0a34351dc/samsung_jitterbug_plus_price_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f6b1302-2873-46a4-bc7a-ee00ffb5787c/nizomurukuloredolejafux.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_off00012546.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12546 5180 bytes
SHA-256: 5ebb8e28e616b106dfa3d93546011099f3d58af008c7d9ef6af4711c8d547935
font_01_sfnt_off000136e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136E2 11484 bytes
SHA-256: b5d5ff9a7746cd360cdd77892bc9b17e3262d1bd4d2c58b34304d7d6a8e5d191