Malicious PDF — malware analysis report

Static analysis result for SHA-256 e415688c3fb79586…

MALICIOUS

PDF

114.0 KB Created: 2020-12-30 06:44:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: b538364218fad0178ac6abe316d5e5e5 SHA-1: c69927240bc0fc29a26362803fa74ab844e9fca5 SHA-256: e415688c3fb7958634497f7ba08893b0b4193cc3dc26a3c9f4fec71eec3f3d5a
196 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are generated for SEO purposes, indicating a potential link farm. One of the primary URLs, 'https://traffset.ru/strik?utm_term=marcopolo+world+school', is flagged as suspicious. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. The presence of a 'Password-protected archive handoff' heuristic suggests a common tactic to bypass gateway security.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://traffset.ru/strik?utm_term=marcopolo+world+school PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380700/normal_5fb3df903abef.pdfIn PDF document text
    • https://buwulikifem.weebly.com/uploads/1/3/4/5/134583505/gekagituderujigo.pdfIn PDF document text
    • https://sowimarigakuni.weebly.com/uploads/1/3/4/7/134705136/wobumojar-nasoliziwumoku.pdfIn PDF document text
    • https://fosijegaden.weebly.com/uploads/1/3/4/8/134868146/xogamafapomasu_pubud_gonesejavimina.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490128/normal_5fb9c8a207185.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407314/normal_5fe03b0428ad5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408462/normal_5fa8ca23d1d99.pdfIn PDF document text
    • https://cdn.sqhk.co/dakubakasilu/Th23nQy/97712104666.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/paxunu/best_android_phones_for_gaming.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/76276118021.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/89794939422.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ef0eea8-3790-42dd-92ac-95bd4f335d77/library_of_congress_culpeper_virginia.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/musica_gratis_para_android_online.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/luan_wood_sheets.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00018a31.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x18A31 27372 bytes
SHA-256: a18121dad249bcb55be392dd0c43ab914a06a64d944f51c73e929a652306c200
font_00_sfnt_off0001484d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1484D 2856 bytes
SHA-256: 2cdd336d4ad4698270d9077a3b8ade5aca6d4decd0916d5d918882b18b5a1806
font_01_sfnt_off00015278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15278 5256 bytes
SHA-256: 7d0a380808c852a67f9a63f973f6a0dddca5bb51a0ecfb11574520ab70c27270
font_02_sfnt_off0001646c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1646C 11012 bytes
SHA-256: 099c185f12eae56920d4eff7b343f8a10c11db33fd2cef5bbbba13466d3bd600

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