Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f82c04e6c5f41ac…

MALICIOUS

PDF

68.0 KB Created: 2020-11-22 03:22:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ffdbfe26a0a92ab73f77bf73e0022239 SHA-1: dde1129e687dcd86cd62767e73f04c05389ae6ab SHA-256: 2f82c04e6c5f41ac33fbe48bbb63bfc2dad44db379eb3b9a9f58dd11a62a5fa5
156 Risk Score

Malware Insights

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

This PDF document contains a link farm, directing users to numerous external PDF files, likely for SEO manipulation or to host malicious content. The primary malicious URL identified is https://traffnew.ru/123?utm_term=around+the+world+bass+tab+red+hot, which is presented as a search result. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffnew.ru/123?utm_term=around+the+world+bass+tab+red+hot
    • https://cdn-cms.f-static.net/uploads/4450878/normal_5fa4fe26d924a.pdf
    • https://mesovozilepako.weebly.com/uploads/1/3/4/5/134588792/29264.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/be635724-f1fc-48d4-9487-bc5702afa991/kaninafinavukolusi.pdf
    • https://uploads.strikinglycdn.com/files/64763487-d8aa-4d44-a39d-06b60d47f89c/8885126147.pdf
    • https://s3.amazonaws.com/badodemebo/sewepuxadepefo.pdf
    • https://s3.amazonaws.com/bulujono/19317395091.pdf
    • https://uploads.strikinglycdn.com/files/fc8e4e70-bd9f-405a-b90f-0ad48a417c0d/53893990926.pdf
    • https://uploads.strikinglycdn.com/files/3a353be2-e877-4e62-a8b9-a0c2357f217e/xejes.pdf
    • https://uploads.strikinglycdn.com/files/8b953278-46e6-4c80-8b6a-9bde631e6806/xomezimodozitiweva.pdf
    • https://uploads.strikinglycdn.com/files/b9467060-5dc6-4744-b3dd-657aa5dacd45/whos_your_daddy_online.pdf
    • https://s3.amazonaws.com/viromibukoleliw/83643384359.pdf
    • https://uploads.strikinglycdn.com/files/ff63670d-dc9f-4910-a783-d9c735302f17/lotafevesawakedoro.pdf
    • https://uploads.strikinglycdn.com/files/10c16e8c-3014-499c-949b-b49a9d845f27/tom_ve_jerry_kovalamaca.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_off0000ba1b.bin
738b52dae7b18688de4950f3995e2956c8b53210a3ff891f42fc3ae3279dfc96		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA1B 4968 bytes
font_01_sfnt_off0000cafe.bin
26b388dc77511d93cc63f380a685b4a5c218ad2e9d0d940b5ffc8de6f07035f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCAFE 12924 bytes
font_02_sfnt_off0000f316.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF316 4324 bytes

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