Malicious PDF — malware analysis report

Static analysis result for SHA-256 51d8f57288191298…

MALICIOUS

PDF

159.5 KB Created: 2020-11-18 02:06:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e3f2382e5b4e57c7656e888c59fd7da5 SHA-1: 2396a09502cc8b0f7e463755932380aa6224d4b5 SHA-256: 51d8f57288191298843b5a6db8bcb6be4b05b9771887dbe2aa19396222e6b512
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • 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.
  • 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://ggtraff.ru/123?utm_term=throne+of+elves+song+list In PDF document text
    • https://cdn-cms.f-static.net/uploads/4406166/normal_5f9add76b05ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384318/normal_5fa12ad10244a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369491/normal_5f891d51b0d96.pdfIn PDF document text
    • https://vibitaxipeni.weebly.com/uploads/1/3/4/5/134526550/dopuzora.pdfIn PDF document text
    • https://posodukur.weebly.com/uploads/1/3/4/3/134347560/9561b.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/widuxade/puvegeboragixonisasilep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/962f3072-a11d-4258-ba27-a9781186b3f3/flappy_bird_apkhere.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/automatic_appliance_parts_rockford.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/mikevosubusobokove.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/avometer_8_mk_3_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df78bea5-52f5-4835-b60c-8dfa21f4ce54/bewoxunimarif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1697635c-a212-4654-b1c1-d91818a48b5d/red_queen.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/dewirovujet.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 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000224ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x224AB 4340 bytes
SHA-256: 21ead156ac97520489b8321c0b207f00436174bd50893bb75b17da2d7245805b
font_01_sfnt_off000233e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x233E0 4828 bytes
SHA-256: a40327df70fb65146c53936646e387984e9cca4bbbb3c12d86d27b83fd1aefb7
font_02_sfnt_off00024456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24456 13732 bytes
SHA-256: 242484d545ab298a1eb3fd1ba736fbb29b0c2d08a020ee9d8f4234354f0dcc2e

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