Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f9170cd62213823…

MALICIOUS

PDF

92.0 KB Created: 2021-03-24 04:33:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa0d93585bd77c43702944ba9be46b6d SHA-1: 7342f35df9abaf326e6318afd56f53b7eb7069b9 SHA-256: 8f9170cd6221382327fd2a89d4aaf4fdcab5f8292b1d88bf12b8a50f261d6220
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that redirects to a search result page, likely a lure to trick users into clicking on further malicious links. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create PDF documents from web content, further supporting the phishing lure hypothesis.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/wix?keyword=electric+dreams+movie+soundtrack
    • https://cdn.sqhk.co/tesikotuk/hbaKYEM/cross_road_blues_cover.pdf
    • http://gipovasota.sportsontheweb.net/47644842464.pdf
    • http://dokojekiferej.mygamesonline.org/dopunubejira.pdf
    • https://cdn.sqhk.co/givogaduta/ghaibW3/lekimopetitabesozozevuxu.pdf
    • https://cdn-cms.f-static.net/uploads/4473375/normal_602c0b7d024d5.pdf
    • http://nofixeb.iblogger.org/bengali_wedding_food_menu_list.pdf
    • https://static.s123-cdn-static.com/uploads/4474727/normal_5fdfbd2726abc.pdf
    • https://cdn.sqhk.co/bizujutenifo/icNYDig/13999011306.pdf
    • https://cdn.sqhk.co/rapawaferew/ihSgjng/sim_dashboard_ios_free.pdf
    • https://cdn-cms.f-static.net/uploads/4368763/normal_604fb55e514fd.pdf
    • https://cdn.sqhk.co/vamunidibu/hhsQjec/feudalism_in_europe_vs_japan.pdf
    • https://cdn.sqhk.co/mazasofuw/j5EwsM7/nupoxizis.pdf
    • http://ravigimojamel.mypressonline.com/18465744938.pdf
    • https://cdn.sqhk.co/guwaloxipete/gmLeghx/speed_night_3_hacked_apk.pdf
    • https://cdn.sqhk.co/tomubozes/idd75Ye/61880785642.pdf
    • http://fatunatet.getenjoyment.net/adverb_or_adjective_worksheet.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tuwodafuvu.epizy.com/nadexezavime.pdf
    • http://fatewazut.epizy.com/christmas_music_list_youtube.pdf
    • http://doriponesarom.myartsonline.com/html_css_javascript_php_mysql_book.pdf
    • http://jofanemapax.epizy.com/10651846355.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012a1c.bin
c8c70bc5defcaf72956bcb52c9056cb68137e3bcc4f8a632096ea091e5819905
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A1C 5164 bytes
font_01_sfnt_off00013ba4.bin
67c6b92b2b8ccf06e6d57ae0390bc3a78d4da0738b311ef472ac71587c8f4ce0
pdf-font-stream PDF embedded font (sfnt) at offset 0x13BA4 11764 bytes