Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7287bdbeed5de5e…

MALICIOUS

PDF

66.4 KB Created: 2020-12-22 17:16:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 16b5781a7d0d3c5747f763a2702c7c81 SHA-1: 77f686d290952a855894ba31d8ef62701dc1b511 SHA-256: f7287bdbeed5de5efbe967b5bf5391bd84ba029c96c1069f374e831a26056028
196 Risk Score

Malware Insights

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

The PDF file contains numerous external links, including one to 'trafficel.ru', suggesting a link farm or phishing attempt. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document may be instructing the user to open a password-protected archive, a common tactic to bypass gateway security. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafficel.ru/strik?utm_term=cute+message+ringtone+for+iphone PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393358/normal_5fd74fc665e5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448551/normal_5fd1ece705df9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366311/normal_5fc401b3f2bd3.pdfIn PDF document text
    • https://pigogokeda.weebly.com/uploads/1/3/1/8/131857695/xaxigiwafun_zereba_foxerugigugod_ligigerenak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365539/normal_5fc5248fef0a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382423/normal_5fdab7eea9f51.pdfIn PDF document text
    • https://vapuwunenerupig.weebly.com/uploads/1/3/4/7/134727873/c2a93d.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/sifawekujiki/xafuxomupovu.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/nurike.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/917814822.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/zitorex.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/wodol.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/xaperoli.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/66697770339.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC830 5188 bytes
SHA-256: d63410a7b71db1ba9e633dd498f59abfbe39fa315b3b9abe9ee52305a42994c4
font_01_sfnt_off0000d9a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A8 10276 bytes
SHA-256: b7e9883db6ff85352d3fd52d28e6ea21f230adcb2057502f078e311b38be6d75

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