Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d889dfd9fed312b…

MALICIOUS

PDF

77.9 KB Created: 2021-04-02 16:58:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 71b4b05d969480492c79b7181a5f0a7d SHA-1: 5e7218a086007a630e762e2e87d69ba462c095a6 SHA-256: 8d889dfd9fed312bb28eed6b9efea52dbae4e086e6d4e4aaf3f9ddfb1441f7e8
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, suggesting a phishing lure. The document body, though heavily obfuscated, appears to be a deceptive title related to email acronyms, intended to trick users into clicking the malicious links.

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://dugedepap.ru/award?keyword=email+acronyms+and+abbreviations+pdf PDF link annotation
    • http://foyou.store/nojegatunofezozavekqg7.pdfIn PDF document text
    • http://ejinaya.com/which_of_the_following_are_underlying_assumptions_of_cost-volume-profit_analysisy70jz.pdfIn PDF document text
    • http://tenipimutav.mywebcommunity.org/47171782595.pdfIn PDF document text
    • https://cdn.sqhk.co/vabadoma/dghtje4/converse_sizing_guide_women_s.pdfIn PDF document text
    • http://effektzhizni.ru/guvefavezobasibezosinufznaob.pdfIn PDF document text
    • https://zoniziwaxetoxa.weebly.com/uploads/1/3/4/4/134441104/wunowe_lipap.pdfIn PDF document text
    • http://i-men.ru/867083596758scvq.pdfIn PDF document text
    • http://moscow-siberian-force.online/87502361244uin8p.pdfIn PDF document text
    • http://wedasuf.getenjoyment.net/attached_book_download.pdfIn PDF document text
    • http://daddytestit.xyz/the_ultramind_solution_redditwy29b.pdfIn PDF document text
    • https://cdn.sqhk.co/letareximo/hq5Zjje/34169044859.pdfIn PDF document text
    • http://xufamorazogubov.sportsontheweb.net/ruxukaleguxikodu.pdfIn PDF document text
    • https://cdn.sqhk.co/pelopuxi/bLMTdGp/orange_ball_tree_pruning.pdfIn PDF document text
    • https://cdn.sqhk.co/mexovaru/QyjgSji/57440804564.pdfIn PDF document text
    • http://lollipopa.online/25940285253m6v23.pdfIn PDF document text
    • https://fofapabijutoza.weebly.com/uploads/1/3/4/7/134713913/popuxata.pdfIn PDF document text
    • https://kobuwudorone.weebly.com/uploads/1/3/4/6/134666959/zodalufadi_pitawunewuro.pdfIn PDF document text
    • http://zoluwofemofuper.sportsontheweb.net/investigacion_descriptiva_concepto.pdfIn PDF document text
    • http://vawurabel.mygamesonline.org/loos_boiler_manual.pdfIn PDF document text
    • http://woxijakuzadajew.getenjoyment.net/4893435715.pdfIn PDF document text
    • https://wavurujubatebar.weebly.com/uploads/1/3/2/6/132682053/bikix.pdfIn PDF document text
    • http://tihefers.online/what_do_dermestid_beetle_larvae_eatccrrf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gutekuretejapoj.onlinewebshop.net/465038808.pdfIn PDF document text
    • http://vujijemu.atwebpages.com/72325096692.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_off0000ef8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8C 5560 bytes
SHA-256: 7d1d2aff8461dc50427bd6af2f8afdd36702cbcea479ef9e971f2dd892d65a46
font_01_sfnt_off00010268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10268 11908 bytes
SHA-256: ff2ff48a0f5380b1469134566efc3247f52c5d4e83752d8d56de5f2cc8cf8a34

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