Malicious PDF — malware analysis report

Static analysis result for SHA-256 f612c7f26daa6a23…

MALICIOUS

PDF

79.9 KB Created: 2020-11-25 18:58:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 2b8e620738b4fc3efb751d0ce3b3bc80 SHA-1: c65d4adbacb7d665297be575b5140e78cdb7e5cc SHA-256: f612c7f26daa6a23c3bef349aaa44024e679ac5751a85e3ec3cd14bc31f2c08f
214 Risk Score

Malware Insights

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

This PDF file contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, contains text related to 'out of office reply outlook 2010', suggesting a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/123?utm_term=out+of+office+reply+outlook+2010 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366339/normal_5f870eeeca887.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365662/normal_5f8cc2e648138.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366628/normal_5f874ce2569fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414357/normal_5fbddc863161b.pdfIn PDF document text
    • https://vunixumo.weebly.com/uploads/1/3/1/4/131453253/baridujuxopix_kizabukoterirus_fejinidibuvegek_fununavuj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cd182ff-47cd-4e51-bd6d-39128c437fd8/stargirl_dc_universe_tv_show.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87fb6b1b-bdcd-4abb-bf1e-af9b0112f100/old_gregg_transcript.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25f1035e-b667-4585-8c0b-670012c31d3d/vesiro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bc37e9f-9dcb-42b9-80b3-7555494a4e30/16466433430.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/85733702577.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa3018ec-6b11-4191-835f-0ed20abe086d/kageperol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56146c0d-1348-4bbe-9d92-47291d41d3b2/phim_tvb_hk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a20bfe34-c97d-45f0-9e52-0b1e149ba57b/watch_jersey_shore_family_vacation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed4d1c00-d389-4eef-bc5c-742a9f195942/4804406014.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000deb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB6 5140 bytes
SHA-256: e3ad0151cc6768f878f36d751b72e3ca71294789b51492835932138468a1c74f
font_01_sfnt_off0000f05d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF05D 13184 bytes
SHA-256: 39f0a7f980276e510b110d1962df573b68a00df2c4209bbb4fe548c502f3ce07
font_02_sfnt_off00011bdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BDF 16348 bytes
SHA-256: 108920e9455b67b86f2c27d45a949ce0e77cf9471fdd7b37f0474fc8911fa5e9

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