Malicious PDF — malware analysis report

Static analysis result for SHA-256 465715633cad0719…

MALICIOUS

PDF

87.6 KB Created: 2021-03-15 10:42:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7ef1d06945cddd9ce8a1415544804c4 SHA-1: 7cbbc8c7ed77ab3cccc19389a610871235cf5866 SHA-256: 465715633cad07198dd9c2da85ccb8597ee7dff88539d01e6460286aa484fe65
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a PDF link farm heuristic suggests the document is designed to host or link to numerous external resources, with one URL pointing to a suspicious domain. While no scripts were extracted, the embedded nature of the links and the PDF structure itself are indicative of a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://nipisod.ru/123?utm_term=answer+you+back+en+espa%25C3%25B1ol
    • https://sojagifuwolu.weebly.com/uploads/1/3/4/6/134689160/6241327.pdf
    • https://kogekotosejikol.weebly.com/uploads/1/3/5/4/135400664/103224114bef95.pdf
    • https://totaduwuvib.weebly.com/uploads/1/3/0/9/130969262/9536363.pdf
    • http://fazaziratizedup.22web.org/39872188364.pdf
    • https://dulowufokupi.weebly.com/uploads/1/3/4/4/134495444/demoguguset.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://9d76d0c6-5807-43ac-a2ba-7b4112d1a20a.filesusr.com/ugd/5cd33b_8fad49a18f444e2bb94129848cd960c9.pdf?index=true
    • https://s3.amazonaws.com/zazelujeju/exam_essentials_cae_practice_tests_2015.pdf
    • http://letekafot.rf.gd/can_you_manifest_a_specific_person_to_love_you.pdf
    • https://s3.amazonaws.com/metakibeme/vinayaka_devotional_songs_in_telugu_free.pdf
    • https://s3.amazonaws.com/badodemebo/3847198607.pdf
    • https://s3.amazonaws.com/falufusu/alisha_chinai_song.pdf
    • http://velawomonoxejuz.epizy.com/32838183854.pdf
    • https://s3.amazonaws.com/tobovunoberiki/dirt_devil_endura_max_assembly_instructions.pdf
    • http://sutabofuvizeja.epizy.com/what_cvs_pharmacies_are_doing_covid-19_testing.pdf
    • http://fobonerenajob.epizy.com/luxury_travel_guide_awards.pdf
    • https://s3.amazonaws.com/xeroguru/58918872594.pdf
    • http://xonukekavufimil.epizy.com/36208807153.pdf
    • https://729282ec-1290-4cbc-9302-cf8a24acd4c7.filesusr.com/ugd/42c189_60a90a8fb27f4f98a37ee648b0bf4a50.pdf?index=true
    • https://f3dcd8e3-6656-4b47-a81e-a993d3c4f2a1.filesusr.com/ugd/aa9ef2_fb43d4d3c30447548d43baed907baa1e.pdf?index=true
    • https://952d9f4b-853a-4e85-af28-23c4d489d487.filesusr.com/ugd/8db125_c8608ddd2d204db1a2cd83b6f483b8e8.pdf?index=true
    • http://mimenevav.epizy.com/79517856620.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcd3.bin
703324e182dcc4db06b2dc366baa0c9042fa3437b55f8d1482ffb7d38dc6d235		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD3 5524 bytes
font_01_sfnt_off00010f85.bin
311f77dfdde3ed9ef777f3407ad901b3eee10e7e202ea4d782b01fe18d72ddee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F85 13092 bytes
font_02_sfnt_off00013a2d.bin
bd4ec210b6f0bed3603b49d512cd9a08d3e9d1e81fcf206800274a46106400dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13A2D 16068 bytes

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