Malicious PDF — malware analysis report

Static analysis result for SHA-256 83f0d05fca210d92…

MALICIOUS

PDF

77.7 KB Created: 2021-03-06 23:44:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: afe07444979eebe6f507e12c3a0e2f3d SHA-1: 9ea49cda67c1cbfbf64a388729b491313ccc42f7 SHA-256: 83f0d05fca210d92837bfe4698a4ef92409f029c149d951df4f850086d944495
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 0.9952

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 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://golowaki.ru/award?keyword=g+shock+dw9052-1vdr PDF link annotation
    • https://subowenove.weebly.com/uploads/1/3/2/3/132303013/jumuxuzotafumuse.pdfIn PDF document text
    • https://gozowejikagigu.weebly.com/uploads/1/3/5/3/135345496/576a7b55a23d2e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445736/normal_60340d653543e.pdfIn PDF document text
    • https://jegobagugixados.weebly.com/uploads/1/3/4/8/134858953/9833980.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426407/normal_602ed137276b6.pdfIn PDF document text
    • http://mikovil.mywebcommunity.org/how_to_dye_yarn_multiple_colors.pdfIn PDF document text
    • http://dkblogin-de.com/jeeves_and_wooster_theme_violin_sheet_music0rcho.pdfIn PDF document text
    • http://lixodamevurobar.mygamesonline.org/dell_latitude_e7450_price_in_bd.pdfIn PDF document text
    • http://tapadobav.iblogger.org/13254525781.pdfIn PDF document text
    • http://stikc.xyz/puxozo3s85g.pdfIn PDF document text
    • http://freehookup.xyz/85360984568xk2ir.pdfIn PDF document text
    • http://raguvigawak.mypressonline.com/84578399409.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366335/normal_5fcaa69ddff46.pdfIn PDF document text
    • http://vatemuredaxusob.22web.org/jimekoxowupujo.pdfIn PDF document text
    • http://cetop.xyz/carrom_game_mod_apk8n0kw.pdfIn PDF document text
    • http://airned.ru/fundamentals_of_probability_with_stochastic_processes_solution_manual9p4m7.pdfIn PDF document text
    • https://lokesikaneweb.weebly.com/uploads/1/3/1/4/131437695/634276.pdfIn PDF document text
    • http://xorabawik.medianewsonline.com/vorelulatipazalupe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452608/normal_6005823eaefdd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gomugugagaf.onlinewebshop.net/calorie_counter_app_free_iphone.pdfIn PDF document text
    • http://pomababotesu.rf.gd/rexaliv.pdfIn PDF document text
    • https://c809e8a6-5bdf-489d-8d8c-df4e4638a115.filesusr.com/ugd/45a296_1444c9597b8a462f9b6542e2facc7f6f.pdf?index=trueIn PDF document text
    • https://2c8134a4-d865-4da1-8961-c755d7242105.filesusr.com/ugd/6dcf04_5e55110eba274f92bb714ee225422b45.pdf?index=trueIn PDF document text
    • https://a52dd608-e7dd-4d50-8005-e0fd7a3896b4.filesusr.com/ugd/43d2fc_4a35d36ad22c4ddca2ec802334482a31.pdf?index=trueIn PDF document text
    • https://e97408dc-4b05-4e3b-9f19-f4127feb49ef.filesusr.com/ugd/a42eed_9c6da0a11ef94fee93f09b7c69176484.pdf?index=trueIn PDF document text
    • https://167c2301-eccc-4e3a-a609-38a4f17b9bf8.filesusr.com/ugd/b1dabf_2b8d674e5b5846e3a6dc5b4fb74c5592.pdf?index=trueIn PDF document text
    • http://gakinodimojulat.rf.gd/86972181653.pdfIn PDF document text
    • http://xenukelo.rf.gd/how_to_use_training_shock_collar.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_off0000f082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF082 5672 bytes
SHA-256: 9e01aaf1972b7476a4d7729b08e6f65ff8dbbd52dc0ab4d93e9376d704523d0f
font_01_sfnt_off000103ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103FF 10784 bytes
SHA-256: f6a3f527bf5f27abd881548d1eb9ca930423816ca632d7151e8635d5ea40dba5