Malicious PDF — malware analysis report

Static analysis result for SHA-256 05224f575d1587e8…

MALICIOUS

PDF

36.3 KB Created: 2020-10-26 05:59:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 11164cec5c3355dcc100af890f8eb66d SHA-1: e1f2b4fcda991c73574db867c56ef025957e8554 SHA-256: 05224f575d1587e89007354f09484f3463b7830f419d77498a68c6790da97a1c
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a link that redirects to a malicious URL, identified by heuristics as a redirector for free-download phishing. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the same malicious URL, suggesting the primary purpose is to trick users into clicking the link to download potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/strik?keyword=fetih+1453+download+in+urdu In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369494/normal_5f9172d9839d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366354/normal_5f8de0aa3c24b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369771/normal_5f885c6980b8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384483/normal_5f90809b18d01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392215/normal_5f8e4c9f1e7b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388598/normal_5f92825e5f01c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366047/normal_5f8d5d9174d4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371266/normal_5f8ea72b4dcb3.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/396d52e8-68b7-4d12-b750-3f8720e3465f/48837076413.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac534674-9388-47ca-9d66-bbe53b83b7f8/gejotunisuvaposo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07c528a1-d31f-49c1-a797-649a542f6a37/48342240700.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/bivariate_correlation_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/parts_and_functions_of_bacterial_cell.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/dikexefajon.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/temug.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/atividades_dislexia_alfabetizao.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/abecedario_aleman_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/bihar_tet_notification_2017.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 3

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_off00004cad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CAD 5212 bytes
SHA-256: 6d1b83b59073f9dfbeac081ef20c932e38860c8f9d604a340720606be9ce890f
font_01_sfnt_off00005e7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E7A 11564 bytes
SHA-256: db2785901c4b402f0f2aa22e17bdda3084edfbdfeb888288d50c1ee6acce684f

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