Malicious PDF — malware analysis report

Static analysis result for SHA-256 08799991a14a96f5…

MALICIOUS

PDF

95.1 KB Created: 2021-04-03 08:28:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac73ecaf58d6be190e9306286a431d17 SHA-1: 45df095c793ebc8a356c9b5c4bb7cd3f4711f30d SHA-256: 08799991a14a96f5d905ce03938347cb32b15532db5a4e632162f667ced3b555
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm, suggesting a malicious intent to redirect users. The presence of a "download" lure and a critical ClamAV detection for "Pdf.Phishing.Trojan" further supports a phishing or malware distribution attack pattern. Although no scripts were explicitly extracted, the PDF structure and numerous external links indicate it's designed to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://kuzutuzo.ru/award?keyword=haryana+current+affairs+in+english+2020+pdf
    • https://cdn.sqhk.co/kigaratak/g1dQhbB/81115198916.pdf
    • https://vozopameniv.weebly.com/uploads/1/3/4/5/134593493/7708745.pdf
    • https://lefoteliwe.weebly.com/uploads/1/3/4/0/134095852/7cc388509c7590.pdf
    • http://gutagige.sportsontheweb.net/22993954161.pdf
    • http://rubewox.sportsontheweb.net/the_curious_writer_brief_5th_edition_free.pdf
    • https://cdn.sqhk.co/sobexofap/AkgjiqU/bs_petroleum_engineering_universities_in_pakistan.pdf
    • https://cdn.sqhk.co/zirigajer/jgjhigc/lelovadowoganegobebigoke.pdf
    • http://lonotel.mygamesonline.org/vawoviduserod.pdf
    • http://dalidusiz.mywebcommunity.org/polycab_cable_price_list.pdf
    • https://cdn.sqhk.co/tebefaravuz/Xjdhgja/win10_online_simulator.pdf
    • https://cdn.sqhk.co/tifisizeliz/cJ5jioJ/happy_birthday_cake_pics_with_name_ali.pdf
    • https://daxolefuziru.weebly.com/uploads/1/3/5/9/135963055/6076210.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • http://semowomeso.onlinewebshop.net/71157240340.pdf
    • https://s3.amazonaws.com/figugipopar/38462067429.pdf
    • https://s3.amazonaws.com/rexogeguxosix/roblox_btools_2019.pdf
    • http://jokosen.atwebpages.com/76793712420.pdf
    • http://fugufaza.myartsonline.com/langman_s_medical_embryology_12th_edition.pdf
    • http://fabedidatifi.onlinewebshop.net/niwejesolawifalivasawepok.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000117bb.bin
6e55c918eb6df39b138a6a3727b31252b89d1e99b34d8afc7496371a451777cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117BB 5752 bytes
font_01_sfnt_off00012b56.bin
07753265bcd6ab4d3294da72440759367576785ee8b200c932f3069640fb6c5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B56 11140 bytes
font_02_sfnt_off00015179.bin
d596f428623937f8920e8539d2f7942281c492336fd8a665c511e15764302a9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15179 8604 bytes

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