Malicious PDF — malware analysis report

Static analysis result for SHA-256 8efeae01ae9c0182…

MALICIOUS

PDF

95.6 KB Created: 2021-02-27 15:54:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 7dc1c4b823a3d4e9a6348fd3c92b9384 SHA-1: d76eb94b03276c276f06eb0072cb71d049602ffd SHA-256: 8efeae01ae9c0182f8bb147537c3c2bb3d244b0e75bc6364e3359c4be35fe158
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting or link farms, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of external URIs and the overall structure are consistent with a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/wix?keyword=download+film+korea+alive PDF link annotation
    • http://memubalejegezur.66ghz.com/crossfit_level_1_trainers_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/wesaduleb/bmrFm1f/51966245995.pdfIn PDF document text
    • https://cdn.sqhk.co/vewukiziwemi/idt8gcP/does_amc_plus_have_a_free_trial.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486035/normal_6028c0e300faa.pdfIn PDF document text
    • http://zawimumerefop.iblogger.org/tuvipanezejitapativ.pdfIn PDF document text
    • https://kuginipa.weebly.com/uploads/1/3/4/8/134853520/pobepunov.pdfIn PDF document text
    • https://navijaxilof.weebly.com/uploads/1/3/2/6/132696044/dunonubejizo.pdfIn PDF document text
    • https://fugikoji.weebly.com/uploads/1/3/4/6/134611078/poxefezire_kiwedejerodiwu_nofibaxe_davemegerizaxi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488316/normal_5fcaa41c1f5e5.pdfIn PDF document text
    • http://xuxelenoxuze.iblogger.org/62428857189.pdfIn PDF document text
    • https://cdn.sqhk.co/firijanab/aojbxjc/hockey_skating_tips_for_beginners.pdfIn PDF document text
    • https://giwelexe.weebly.com/uploads/1/3/0/8/130814055/volasilazamabofasosi.pdfIn PDF document text
    • http://xekaminam.22web.org/amor_de_mi_alma_lyrics.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://funuduki.rf.gd/systems_of_linear_equations_graphing_worksheet.pdfIn PDF document text
    • http://petojijoxura.onlinewebshop.net/what_is_the_meaning_of_the_little_prince_story.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000114c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114C1 3580 bytes
SHA-256: 03e6d9eec2146c3465aff05c6fe863fa49eebbb6cc4591def5d75d89498caa22
font_01_sfnt_off00012196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12196 5088 bytes
SHA-256: 6c73350b7d75d907e844f4aaf1fb44835d3ec9d3654f04a79724c91c45ab75d6
font_02_sfnt_off000132f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132F5 12048 bytes
SHA-256: 7cf20ca0392fc52fc15984392a0f05312be99c9242e5e1a4f91ee54b9f83c673
font_03_sfnt_off00015c03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C03 16100 bytes
SHA-256: 82c39602efa5c553827d786419f772ead6cd37265bd772e4eed7c871b6d0080b

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