Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f7229fe9ecbe03f…

MALICIOUS

PDF

70.2 KB Created: 2020-11-25 22:51:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 323e4961a71f23836d7dbd7e545fcc43 SHA-1: 58155f5213198fef15e10989b04bab5f1854a931 SHA-256: 5f7229fe9ecbe03f1826e31f61572c920fb9e80fb6aeac9716ccc7f901ce1f96
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains numerous external links, including one to 'traffnew.ru' which is suspicious and likely part of a phishing or malware distribution scheme. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, and 'ML_NYX_PDF_MALICIOUS' along with 'CLAMAV_DETECTION' strongly suggest malicious intent. The presence of a 'SE_DOWNLOAD_BUTTON' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=driver+toolkit+crack+filehippo
    • https://gizewafimeferem.weebly.com/uploads/1/3/4/5/134578419/bbe95975590.pdf
    • https://pawuxadatunu.weebly.com/uploads/1/3/4/2/134266652/3729969.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jikopot/71994626001.pdf
    • https://s3.amazonaws.com/sugaguxagu/4445480602.pdf
    • https://s3.amazonaws.com/fewifuwu/monte_vista_high_school_cupertino_calendar.pdf
    • https://uploads.strikinglycdn.com/files/1d3cbdeb-9e5d-4ee9-8649-3d9fad3927fc/darapumivifolozokos.pdf
    • https://uploads.strikinglycdn.com/files/ab4efc9d-3c3a-4753-a66b-80f456f28727/sistema_internacional_de_unidades.pdf
    • https://uploads.strikinglycdn.com/files/70454b64-a1dc-4d6f-a05f-6b034ef05a08/acing_business_associations.pdf
    • https://uploads.strikinglycdn.com/files/0612245d-abc2-49ac-96ad-b3d76155cb58/heard_on_the_street_download_fre.pdf
    • https://uploads.strikinglycdn.com/files/37bb21f6-b023-441d-863a-e4527dba9757/38898742860.pdf
    • https://s3.amazonaws.com/rogugagatuf/53256304532.pdf
    • https://uploads.strikinglycdn.com/files/98525672-e8bf-4da6-8a80-45f89743615a/mixoduzoteb.pdf
    • https://s3.amazonaws.com/kofabube/creative_character_design.pdf
    • https://s3.amazonaws.com/pafexegud/92356015559.pdf
    • https://uploads.strikinglycdn.com/files/ed52ad82-02db-4719-80c2-9556275f228d/bepezana.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_off0000d452.bin
eb960e3dff3daf0cc2e39d30636c6eef6cb78a9fe001eff1f511053059ac28e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD452 5048 bytes
font_01_sfnt_off0000e58d.bin
f4ea001a85c17ef90b27c297cc134671ddcc49616c4f453af82e03f711046e9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE58D 10776 bytes

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