Malicious PDF — malware analysis report

Static analysis result for SHA-256 18575694bb035185…

MALICIOUS

PDF

85.5 KB Created: 2021-03-27 17:13:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b1fa38327c774f3ba18c538073e0702 SHA-1: e30e47d05cd82a767cbbb55348e153baf8b96ef6 SHA-256: 18575694bb035185e85f1d7bb59bcba5be39b0caff4b0ec6a99e8aa85f24884d
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, forming a link farm, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to 'Accidente riesgo biologico pdf'. The presence of multiple external URLs, including a primary one at 'mezovuduw.ru', indicates an attempt to redirect users to potentially malicious content or phishing sites. No scripts were extracted from this sample, but the overall structure and URL distribution are consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/award?keyword=accidente+riesgo+biologico+pdf
    • https://cdn.sqhk.co/nezipumosot/eghhjSP/dilobozugegufojobosewo.pdf
    • https://kobosarajuxinit.weebly.com/uploads/1/3/0/9/130969632/951579.pdf
    • https://cdn.sqhk.co/bupitagalir/gfYoLZv/biriwigetozadunefiweg.pdf
    • https://bugojexipu.weebly.com/uploads/1/3/1/3/131398417/91383f6f9cbc8.pdf
    • https://cdn.sqhk.co/zamupefa/Eieefjh/xemil.pdf
    • https://zobojosapez.weebly.com/uploads/1/3/1/4/131483592/62cc2933bf5a4.pdf
    • https://latoratepowubum.weebly.com/uploads/1/3/4/7/134713938/kukadobiwisosep.pdf
    • https://kunudixi.weebly.com/uploads/1/3/4/6/134667289/305e743.pdf
    • https://cdn.sqhk.co/jixuvepabu/ecjdtAX/dizedotekobijagipekuwop.pdf
    • https://wejapunikiver.weebly.com/uploads/1/3/4/2/134266614/pakukon-jepuxuzujak-xelerofon-xevem.pdf
    • https://nafipitomaw.weebly.com/uploads/1/3/5/3/135349771/wufezatovadutu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://5984e891-aecd-43e6-866f-efdb297c9c35.filesusr.com/ugd/403565_5f2e33caa5a8407cbb3be9cdb41b6834.pdf?index=true
    • https://ca6b24e6-01cd-4368-a310-1df05077a315.filesusr.com/ugd/11b39a_353090d19c484e698f233da5bf642d77.pdf?index=true
    • https://s3.amazonaws.com/rabewiruzitewa/regulatory_reporting_jobs_in_mumbai.pdf
    • https://s3.amazonaws.com/feliso/bts_informatique_alternance_lille.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101bc.bin
7fb78fe903db1381044792fcd7cd84a41618ec6e73dcb76a4867c7ea4793c477		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101BC 5028 bytes
font_01_sfnt_off000112cd.bin
9413c9897cca8dceb1f17d517323308364ae982b4efc0f5695bfc17a70da024b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112CD 11912 bytes
font_02_sfnt_off0001398e.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1398E 4324 bytes

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