Malicious PDF — malware analysis report

Static analysis result for SHA-256 004396320cc8f182…

MALICIOUS

PDF

59.8 KB Created: 2020-11-18 10:55:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: c000a3e0a33fd725e177d1b4b85bb47a SHA-1: 12bd84a417140d305c1d9028426acd0099fd8b06 SHA-256: 004396320cc8f182ee19ba37392ab8c69e9612ae5fa3495803c0f42822cb945a
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a lure related to 'Wordscapes answers level 8542' and embeds a URL pointing to a known malicious redirector. This suggests the document is designed to trick users into visiting a malicious site, likely for phishing or to download further malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gettraff.ru/aws?utm_term=wordscapes+answers+level+8542 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4415946/normal_5fad818ea9037.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370989/normal_5f90da04202c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450424/normal_5fb4d2bd699ac.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/wovisak/best_lightroom_presets_torrent.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/bar_cookies_condensed_milk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/694b60cf-2c43-4c8f-a51b-8b58d11b144c/conan_exiles_crack.pdfIn PDF document text
    • https://s3.amazonaws.com/gajejasa/super_mechs_mod_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a80ae364-e18b-4ea2-a822-43e0fca84ed1/30162156375.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/853a4345-0efe-4fab-ae2a-36e2cee15a88/molokuliduloxib.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/rilajutegodifolifam.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/how_many_colombians_in_the_us.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_off0000abc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABC5 5768 bytes
SHA-256: 4264dbdf77a0474b12e737ed788e2723da6fb9b6c285639127fa59cf6aff52a1
font_01_sfnt_off0000bfa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFA0 10244 bytes
SHA-256: 7006b0a1f208ad6ee499a461cde987868e1b21dd1234ad36585e7be242af5721

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