Malicious PDF — malware analysis report

Static analysis result for SHA-256 cad198085440abcd…

MALICIOUS

PDF

99.3 KB Created: 2021-02-17 03:26:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ace6944b6fd8fb72c278e88e0901bdb SHA-1: bc21dbb0b4400853ec9f9de4e5ae020c087afbb6 SHA-256: cad198085440abcd308efb979e441012e53ebd53ac07760f0f1158e9e34d7b6a
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains a large number of external links, suggesting a link farm or phishing attempt. The embedded URLs point to various domains, some of which are associated with potentially malicious content, and one URL is specifically identified as a lure for 'elric de melniboné pdf gratis'. No scripts were extracted, but the PDF structure and numerous external links strongly suggest a malicious intent to redirect users to harmful websites.

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-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://druttle.ru/wix?keyword=elric+de+melnibon%25C3%25A9+pdf+gratis
    • https://static.s123-cdn-static.com/uploads/4450337/normal_6001fdc0e7eec.pdf
    • https://cdn-cms.f-static.net/uploads/4367007/normal_601b34d71933d.pdf
    • https://pisubemiduburor.weebly.com/uploads/1/3/1/3/131380627/6769953.pdf
    • https://xonesomo.weebly.com/uploads/1/3/0/7/130739362/00df5.pdf
    • https://tojabefe.weebly.com/uploads/1/3/2/3/132303019/9b1ca4c2a4.pdf
    • https://metojonokodoto.weebly.com/uploads/1/3/4/8/134881876/4615229.pdf
    • https://static.s123-cdn-static.com/uploads/4401712/normal_5ffa865344b9e.pdf
    • http://ayazshabutdinov.club/kijovuzipeba1it8u.pdf
    • https://wididalinur.weebly.com/uploads/1/3/3/9/133986726/b4a4999c320.pdf
    • https://cdn-cms.f-static.net/uploads/4422373/normal_602729f66b3d2.pdf
    • https://wafanipo.weebly.com/uploads/1/3/2/6/132695839/124844.pdf
    • http://arthromedro.xyz/dragon_ball_z_free_episodes_downloadrjqvh.pdf
    • http://vvvvvvvvvvvvvvvvvvvvvb.xyz/mokafidomifefedupiperun7y9v8.pdf
    • http://nout-prokat.website/32366500781seycy.pdf
    • https://pixadodo.weebly.com/uploads/1/3/2/7/132740612/kagofelipek.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/vebenok/harga_remote_answer_back_system_scoopy.pdf
    • https://s3.amazonaws.com/wovisak/93354500220.pdf
    • https://s3.amazonaws.com/wetevali/reniwanozilugel.pdf
    • http://zefixufedinokas.epizy.com/lovupevojomuf.pdf
    • http://mimonutemabase.epizy.com/bollywood_movies_new.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_off0001399b.bin
9e04d0aa17ad29afbeb94befbc6ae1f86690573897f0c7fa6dbf3e272220991e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1399B 5504 bytes
font_01_sfnt_off00014bdc.bin
ad74897c9eb00eaeda4506aa1db97faeb2b899ba0e232e2e8b78231991830ee8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14BDC 10364 bytes
font_02_sfnt_off00016f5c.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16F5C 4324 bytes

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