Malicious PDF — malware analysis report

Static analysis result for SHA-256 01e231df5f16f84f…

MALICIOUS

PDF

77.6 KB Created: 2021-04-13 22:19:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1bf113490ff14ec2c2856c04fff2c944 SHA-1: 2d697822077009fc848c749093d11e4763cce69c SHA-256: 01e231df5f16f84f71ee42a7fb2c337386490badc50cd51e7c29da3c49b07450
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating high maliciousness. The PDF contains a large number of external links, suggesting a link farm or phishing attempt. The primary malicious activity appears to be redirecting users to external URLs, such as https://ponafet.ru/strik?utm_term=la+republica+de+platon+pdf+libro+1, which likely host further malicious content or phishing pages.

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=la+republica+de+platon+pdf+libro+1
    • https://cdn.sqhk.co/tuledapozato/msgiggK/deparukowivifexok.pdf
    • https://xorewodanuvidiw.weebly.com/uploads/1/3/1/3/131381095/4926851.pdf
    • https://cdn-cms.f-static.net/uploads/4481994/normal_5fe9017f12a00.pdf
    • https://cdn.sqhk.co/nefikelifu/Tjjm0gh/26407093864.pdf
    • https://letotanuvimipe.weebly.com/uploads/1/3/4/5/134598603/lepaxanefape.pdf
    • https://cdn-cms.f-static.net/uploads/4493920/normal_601dbb63d454d.pdf
    • https://dogonojibot.weebly.com/uploads/1/3/1/6/131606640/nafizasilat_xigepif_jenilot.pdf
    • https://gujibimusexuwub.weebly.com/uploads/1/3/4/0/134042380/7bf9379578b6c7.pdf
    • http://lololoj.sportsontheweb.net/laxagatofemanuwa.pdf
    • https://cdn-cms.f-static.net/uploads/4450728/normal_60537ce15a6ff.pdf
    • https://cdn-cms.f-static.net/uploads/4377377/normal_6045ee8ea16d4.pdf
    • https://static.s123-cdn-static.com/uploads/4370087/normal_5fc5eb5ac9700.pdf
    • https://static.s123-cdn-static.com/uploads/4393637/normal_6002f587c6cfa.pdf
    • https://risenezapaf.weebly.com/uploads/1/3/4/4/134481661/tetidumedopiweg.pdf
    • https://cdn-cms.f-static.net/uploads/4468837/normal_5fe61bfd79be2.pdf
    • https://cdn-cms.f-static.net/uploads/4378157/normal_5fd6251bc8b85.pdf
    • http://tiriruno.sportsontheweb.net/ciencias_naturales_cuarto_grado.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/867599ec-6203-45f2-b6db-ec5496463652/46802937004.pdf
    • https://uploads.strikinglycdn.com/files/5ef3ccf8-f8b2-450b-8edf-fdb01551e01c/56229798165.pdf
    • https://uploads.strikinglycdn.com/files/538462a0-63c4-4096-b168-08b47059164a/sokij.pdf
    • https://uploads.strikinglycdn.com/files/aa9d37f9-902a-471d-bbb6-76a78a719776/88765397811.pdf
    • https://uploads.strikinglycdn.com/files/5c930dfd-c4a6-40d3-a5eb-984abaf7a9b7/ingersoll_rand_air_compressor_phone_number.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_off0000ef6d.bin
532985853929cd26dec93396d3dbee7574bcc4bf05a25c7f58be029574f5e1d9
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6D 5104 bytes
font_01_sfnt_off000100d7.bin
958e861e06c8d023d2c2791841e864d6da1b92f4fd95470b802ed98c734050df
pdf-font-stream PDF embedded font (sfnt) at offset 0x100D7 12080 bytes