Malicious PDF — malware analysis report

Static analysis result for SHA-256 63ba771f64a47ac1…

MALICIOUS

PDF

67.1 KB Created: 2020-12-31 11:36:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: cf2bf6a727622d1cf43cc7bd7a04ad81 SHA-1: 7a912379bfef9008a68395db2eac13c53de86424 SHA-256: 63ba771f64a47ac10c8f14b1695fbb84bf5e4712a115eb604af516b48cc7ec28
156 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a link farm, with numerous external URLs pointing to PDF documents. One primary URL, 'https://traffnew.ru/123?utm_term=exp+105+personal+dimensions+of+education', is suspicious and likely leads to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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=exp+105+personal+dimensions+of+education PDF link annotation
    • https://pelimabogex.weebly.com/uploads/1/3/4/6/134685965/sejoxobujovaka.pdfIn PDF document text
    • https://cdn.sqhk.co/linigurep/jetiaLL/fufegejulofesafiguzeta.pdfIn PDF document text
    • https://nopefulewipedu.weebly.com/uploads/1/3/4/3/134314682/6582959.pdfIn PDF document text
    • https://zuwukozoxuwiged.weebly.com/uploads/1/3/4/7/134713444/wuredutamixolikaraf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dotivaf/zelienople_police_reports.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82ab11bf-5546-4e4e-a07c-befc0abbe04e/rinotoxuxagadexofug.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/nevulijabowusew.pdfIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/devextreme_datagrid_cell_template.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/93676157493.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/mebomexukizepuv.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/rurike.pdfIn PDF document text
    • https://s3.amazonaws.com/wixatax/fusepama.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/socomec_atys_c30_manual.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bb94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB94 2900 bytes
SHA-256: 10a07fc969e6c8cf41398fcfefa625e426b29a45b33f3716d0886db1405c0d2a
font_01_sfnt_off0000c5d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5D7 5644 bytes
SHA-256: 4e9cc3151e643dc5296c8a8ec8e04f9109715832fead5a51df9a9f53a5a91832
font_02_sfnt_off0000d90b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD90B 10596 bytes
SHA-256: f8a1af62ca61191e63ed9631b43eaaf2ffcee93e71061fe0df7b633eabbdb42f

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