Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f4c4f2fe34c97ed…

MALICIOUS

PDF

74.9 KB Created: 2021-03-03 03:42:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08dffd1786d302227641897b3b137b96 SHA-1: 4392b49dd500a46c7e3f5334ab483705ca1c1ec9 SHA-256: 9f4c4f2fe34c97eda45022a6514020f79be58e858911391c842c91224b7e4a67
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The primary attack pattern involves a link farm of 30 external PDF links, many of which are dynamically generated SEO-style URLs. These links likely lead to further malicious content or phishing sites, aiming to obscure the true malicious destination and distribute malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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
  • 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://vilenefex.ru/wix?keyword=adventure+time+encyclopedia+pdf
    • https://supogile.weebly.com/uploads/1/3/1/6/131606666/bijuvow-wamisa-puboxidujala.pdf
    • https://xizunobalik.weebly.com/uploads/1/3/0/7/130739811/mubozenumivivo.pdf
    • http://vurujupafowutox.mypressonline.com/sefizozopebuxenugivot.pdf
    • https://cdn.sqhk.co/sutazojawote/8ihgjfo/truth_or_dare_questions_game_unblocked.pdf
    • https://dabosimupit.weebly.com/uploads/1/3/5/3/135397997/sinami_sebizomuwa_nikogax_fomida.pdf
    • https://static.s123-cdn-static.com/uploads/4491450/normal_5ff2d5a732615.pdf
    • http://fesotisifofil.mygamesonline.org/how_to_get_maytag_bravos_error_codes.pdf
    • https://cdn.sqhk.co/gukitane/jbjaOii/plot_elements_definition_literature.pdf
    • https://tonukujile.weebly.com/uploads/1/3/1/8/131857071/zirevebu-fidofo-texojugaziz.pdf
    • https://cdn-cms.f-static.net/uploads/4463308/normal_6023f4530db92.pdf
    • https://zotagozugub.weebly.com/uploads/1/3/0/7/130739891/tuxidizaw_redasajene_bixikox_jakidiwitimifav.pdf
    • http://wufamega.scienceontheweb.net/nuzeza.pdf
    • https://cdn-cms.f-static.net/uploads/4493891/normal_5fe70cb915933.pdf
    • https://gewasulupav.weebly.com/uploads/1/3/0/7/130740056/8609927.pdf
    • https://rolarijigajegij.weebly.com/uploads/1/3/1/4/131438579/5517271.pdf
    • https://cdn-cms.f-static.net/uploads/4469847/normal_601d6eaaabc94.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tuwutexo.onlinewebshop.net/quantitative_analysis_for_system_applications_data_science_and_analytics_tools_and_techniques.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_off0000e859.bin
68062156a4214c9849d0f59a826806f06a396b6f27116b07e332242448796217		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE859 5276 bytes
font_01_sfnt_off0000fa44.bin
5db46802d07a85a8a2d01dfe36a4bc690bfc62b0db588b26082237957dea87a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA44 10696 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.