Malicious PDF — malware analysis report

Static analysis result for SHA-256 518d244cf9c09d3f…

MALICIOUS

PDF

68.0 KB Created: 2020-11-11 14:54:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 6c610b2de2c630e063c08a4b5b2b34ff SHA-1: 16fcf1049e3b7ca354acb3909acd1f01b8aa487d SHA-256: 518d244cf9c09d3f86f18af7fbefaecd59805841ad1263abb2023dee4605ee17
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains embedded links that point to a known malicious redirector infrastructure. The redirector is designed to lure users with keywords like 'photo album names', suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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://traffine.ru/wb?keyword=photo%20album%20names In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370987/normal_5f95c56a81673.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/1daa635c-51b0-44c5-b884-8cec1e67ca61/kojep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcc6f377-0b8c-48ad-b0c8-4bc7adc009cd/gedujosi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a96bc48-daa9-434f-be29-5071fdcdf381/78907546522.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57c39b87-bb82-4c4e-9125-2c107874cc65/auto_owners_manual_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/manual_for_cuisinart_coffee_maker_ss-15.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/27120035798.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/sivugok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b679db7c-297b-40e9-bc37-682331bffae2/luxewuzesenilexobu.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/xikeribiwozevabuvonuxekit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca04ee07-d70f-4df9-ac11-5168c78939c6/momuferafolunezefo.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_off0000cef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF3 4972 bytes
SHA-256: de6d034e65bac1ea32610ae6ac052ef12f4f094d4b7348228f04490f9c569196
font_01_sfnt_off0000dfb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB3 10644 bytes
SHA-256: 5845329714f2ccd93895c4dd4dae07fde6bb5d5aa3b2ee3b6e391dddbac58809

Open this report in the interactive analyzer, or submit your own file for analysis.