Malicious PDF — malware analysis report

Static analysis result for SHA-256 45d9f897723c5c28…

MALICIOUS

PDF

72.4 KB Created: 2020-11-25 01:29:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 435710a0aa11aea8fc2811c23b6d7509 SHA-1: 933d555f46b3d0fbd401baabc7c155ed36ee935a SHA-256: 45d9f897723c5c2827726972c9d1507d186b9185a8cc36b1579d4e89343d100e
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains embedded links that redirect to a known malicious URL, identified by multiple heuristics as a phishing or redirector service. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or to serve a secondary payload. The document body, though heavily obfuscated, appears to contain text related to 'Breakout kings season cast', potentially used as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cctraff.ru/123?utm_term=breakout+kings+season+cast In PDF document text
    • https://rajexomogalifi.weebly.com/uploads/1/3/4/8/134891851/zorisivifiz_sufawasaxujuli_tiduramoxeruji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471706/normal_5fbd8ed08904a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424689/normal_5fa59c9db8196.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382193/normal_5f8fc73784088.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427274/normal_5fa509711e92d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/20eb063b-1c92-4cf4-a710-eb913df93517/94649979777.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/nufapofimagefexabevoke.pdfIn PDF document text
    • https://s3.amazonaws.com/runuzitexokol/83991817305.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/brooklinen_sateen_sheets_reviews.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d367.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD367 4928 bytes
SHA-256: de889328ccf9c377eefc313d26fc44b3942195abb339a79f5a7502915bee89eb
font_01_sfnt_off0000e440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE440 10156 bytes
SHA-256: 97e7c6a416edb5d0ec84c0137cbb11e08eb4dbdbba481204e961585aa7bdfc72
font_02_sfnt_off000106d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D9 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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