Malicious PDF — malware analysis report

Static analysis result for SHA-256 e501009e893b66bb…

MALICIOUS

PDF

71.4 KB Created: 2021-03-17 21:19:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 58381b056174342e667e54f2a16b685f SHA-1: ca5ee78f30ecf19f693ee3ef90eb4d3be92766d1 SHA-256: e501009e893b66bbe53cd64c0e4626a5ed894a88a00c0d8d03014b02cb069206
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high ML score and ClamAV detection as a phishing trojan. It contains numerous embedded URLs pointing to disposable hosting and link farms, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, appears to be a lure related to educational content, likely to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://golowaki.ru/wix?keyword=guide+to+networking+essentials+greg+tomsho PDF link annotation
    • https://cdn.sqhk.co/wugoxoxowex/idVTMTC/42812713879.pdfIn PDF document text
    • https://gebejisidimi.weebly.com/uploads/1/3/5/3/135302949/zorelet_xagide_gujomusukixi.pdfIn PDF document text
    • https://cdn.sqhk.co/podogule/iaiixgj/new_brain_test_tricky_puzzles_level_28.pdfIn PDF document text
    • http://jedusajinud.mygamesonline.org/new_at_taco_bell_august_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/wubumeze/hj1jehc/3746365955.pdfIn PDF document text
    • http://affilateapp.online/dibujogetuparafeocz1g.pdfIn PDF document text
    • https://nilesezijifata.weebly.com/uploads/1/3/4/8/134885493/f09b9048.pdfIn PDF document text
    • http://kolagozisil.mywebcommunity.org/epic_level_handbook_3.5_update.pdfIn PDF document text
    • http://powerhdniy.space/lepebebuxizupiwuselulome7cp6.pdfIn PDF document text
    • http://harkateine.fun/discipline_problems_in_school_report_essayk3paa.pdfIn PDF document text
    • http://ulekschool.online/3067942939724wj1.pdfIn PDF document text
    • http://bimoriz.getenjoyment.net/fisher_price_virtual_toy_museum.pdfIn PDF document text
    • http://100naturals.fun/67762190628diuj3.pdfIn PDF document text
    • https://cdn.sqhk.co/vewukiziwemi/NgchgBl/44829535589.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/35c4f7cc-a60c-4b85-9a4d-1fd93a3136d5/will_there_be_another_if_i_stay_movie.pdfIn PDF document text
    • http://saluwagasa.onlinewebshop.net/line_6_spider_v_120_mkii_120w_1x12_guitar_combo_amp_black.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22060ca9-16c5-44ff-a3e2-73aba307d3f7/pedalefaworaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa4787eb-9c1a-4e44-b4c3-205fd3881bc9/metal_gear_solid_2_substance_cheat_engine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac4549d6-a654-4105-b006-f56220a11cf8/why_do_we_punish_ourselves_more_beautiful.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_off0000da13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA13 5428 bytes
SHA-256: cee990e55e9fd45ac3850892241fc715c4446f1cc8d24cb9d0846608ad0b38f5
font_01_sfnt_off0000ec76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC76 10544 bytes
SHA-256: d76351bfc6277eb19c7d6f0e4e97ae551939b4ae5c763da2be88174e6307996d

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