Malicious PDF — malware analysis report

Static analysis result for SHA-256 70f7097624ad6811…

MALICIOUS

PDF

74.9 KB Created: 2020-12-28 02:47:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: bde663b4b576934a614a76190f42574d SHA-1: 68458c1e88669ff898d92cd6be79b4e50d35f8c6 SHA-256: 70f7097624ad6811895deb22630a30ed56d14411845a99deaef6492f62d434cc
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was identified as malicious by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier. It contains numerous external links, with a primary suspicious URL pointing to 'traffnew.ru'. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, suggesting a malicious intent to redirect users. While no scripts were explicitly extracted, the nature of the PDF and the detected trojan suggest it's designed to exploit vulnerabilities or lead users to phishing sites.

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
  • 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/strik?utm_term=espn+tournament+challenge+winner+2019 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4424985/normal_5fd79cbfec668.pdfIn PDF document text
    • https://teguvubab.weebly.com/uploads/1/3/4/3/134347924/wojuxuvu.pdfIn PDF document text
    • https://guditeni.weebly.com/uploads/1/3/4/5/134529862/fotezadedidup.pdfIn PDF document text
    • https://vepovipozo.weebly.com/uploads/1/3/4/4/134472033/mewotumiwa.pdfIn PDF document text
    • https://cdn.sqhk.co/zowipitilo/DBGm3hh/fontspace_arabic_fonts.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426810/normal_5fa8d42abb935.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393632/normal_5f9a6a33a9a93.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/0caa35dc-5e1f-40ed-9792-052fea4b3d75/66419980518.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b073f39-64ad-42ae-912e-de2b97b22972/36111927366.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56608714-936c-4dc3-b87f-f7e977821059/latale_explorer_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/runakajagijopumeloj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2478d712-47f6-4cc9-a2ee-fedd66881070/xevasetitufafogipukoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bf1b9ff-1057-41a5-9730-cd3fa993f916/tiktok_stock_value.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE314 5880 bytes
SHA-256: 670ea288a7cf74412a117545eeafac392ce2bd8452b5cf5de50c2a347f4c54fd
font_01_sfnt_off0000f708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF708 11928 bytes
SHA-256: 44a56624deff037d992f3aebdf20b1ab40c4c36f5dda41dfb9176ff10e1d2411

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