Malicious PDF — malware analysis report

Static analysis result for SHA-256 47ad12485afdd35b…

MALICIOUS

PDF

90.6 KB Created: 2020-12-16 23:52:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 4e52ef9a55270467f98b5d9172189eb9 SHA-1: 9b30da4cc83830b50e5c1e9026900512c4e7988f SHA-256: 47ad12485afdd35b89819123ae008cadfce539d35875df63bb1e008d0024afe8
136 Risk Score

Malware Insights

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

The PDF contains a high-severity heuristic indicating it's an SEO redirector for phishing, linking to a suspicious URL. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were extracted, the presence of a redirector URL points to an attack pattern designed to lure users to a malicious site.

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
  • 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.
  • 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://trafficel.ru/aws?utm_term=chucky+movies+collection PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5109045d-5b9b-4abd-b4fe-0e493d21949b/peeal_paragraph_slideshare.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/creative_writing_module.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcebaee24192469dc87e5ab/t/5fd063020c0c9b10ab073190/1607492355776/loopback_adapter_rj45.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/65871173351.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/dibapatirovurasafizub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc816117-b4ba-496f-979d-35ee3de269e7/11969092507.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/probability_lesson_plans_high_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eced1637-57cb-45ac-9240-13f6c9fcbd27/94396590261.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/download_zello_app_for_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/grade_2_english_worksheets_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/598f6871-7757-49ff-8e87-e8bef3867010/95383163493.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/291ca674-7dd4-4a15-bc46-3cfcfccdc8ca/juforuwowiwazezuge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/787478de-5107-493d-8336-dbf8408878d2/tupperware_manual_food_processor.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_off000125b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125B3 4864 bytes
SHA-256: 47c9c1146b0e59fbcbba5f040712c6a7ae6ce54f6b44bf089c61fbc5e2f3404e
font_01_sfnt_off00013626.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13626 12316 bytes
SHA-256: b80bf27cb253339c72f82602e63c5a28d5c1edbce041654dbf46f96215b20d16