Malicious PDF — malware analysis report

Static analysis result for SHA-256 396823d733c4fcc6…

MALICIOUS

PDF

84.8 KB Created: 2021-03-05 18:01:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32a83596de1f64dfdd3ff2584b9f4550 SHA-1: 26cbcd7bb7524ee73805f08187f5d45fa02bbe0d SHA-256: 396823d733c4fcc6ad8dbd1c10661ee8a21ac889c2ca468a4630039d62b56644
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, suggesting a link farm or phishing attempt. The primary malicious URL identified is https://ponafet.ru/aws?utm_term=code+of+points+gymnastics+2017+wag, which is likely used to redirect the user to a malicious site.

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://ponafet.ru/aws?utm_term=code+of+points+gymnastics+2017+wag
    • http://kifikawi.66ghz.com/sheetrock_ceiling_patch_kit.pdf
    • https://piwomokoxik.weebly.com/uploads/1/3/5/3/135335333/butisewutar.pdf
    • https://xudapugi.weebly.com/uploads/1/3/4/7/134702609/noletadurebeximo.pdf
    • https://simebofes.weebly.com/uploads/1/3/1/4/131438459/raditobikosufanabu.pdf
    • https://lomimasexoguxi.weebly.com/uploads/1/3/4/7/134736135/9eb55839a0f.pdf
    • http://ritivukepexu.22web.org/medialink_router_setting.pdf
    • https://gikanusubidi.weebly.com/uploads/1/3/4/7/134756500/73d07ae.pdf
    • https://xofofafe.weebly.com/uploads/1/3/1/4/131438501/sudek-vufinutenezew-gimotored-fogekojosogoza.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://d128792e-e0a8-46e0-98ed-b941f5da69b2.filesusr.com/ugd/b98abb_0b826a07267648a792174e438678226c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/0954abb5-abfc-4467-9494-02adf86d4d49/tovabix.pdf
    • https://f6e2a16f-d004-42cd-8f17-0463e090774c.filesusr.com/ugd/c70c35_cb33d5a89ef24bcc912c3bc6f91c4de2.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3aa45ef5-2541-446e-bcef-897feeab40ce/bewilu.pdf
    • http://vozerawirup.epizy.com/aladin_2009_full_movie_480p.pdf
    • https://59e5a08b-0d8d-455f-a3a7-35a3b781ab3e.filesusr.com/ugd/784815_1bad67a4eeb94a72b5207987c85651e1.pdf?index=true
    • https://cdfb6f36-dde2-4af5-b3b7-55ff39976061.filesusr.com/ugd/c6ac46_8d2f2f5c35f34ffebb02e88c53668716.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b46392fc-84d0-4009-ba20-fe20283eae49/taylors_theorem_with_cauchys_form_of_remainder_proof.pdf
    • https://s3.amazonaws.com/pivetuzadujo/quotes_about_school_uniforms_being_good.pdf
    • https://uploads.strikinglycdn.com/files/ea0e3222-7f5a-44f9-a129-fc957bafaddb/vukiwizusafuvezejesixose.pdf
    • https://s3.amazonaws.com/rekawexuretowo/firebojuzafobexoxokes.pdf
    • https://69c5641f-197a-42c1-bef1-daa502c1f1d7.filesusr.com/ugd/948cea_4ba47b7abb93424ba7366615d0dcc65f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/934ef354-8a33-47e8-b854-8cf80385d18f/naxemafemiduwumiferopige.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_off00010c90.bin
37cdc7799e0b569e9f1c9a5aa6e95887bf1629b649b1a65e662c19db474da102		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C90 5852 bytes
font_01_sfnt_off00012092.bin
ae6547085f08709b1163d06ee6777d2bffc2c337fea3bc85925f962356764711		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12092 10912 bytes

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