Malicious PDF — malware analysis report

Static analysis result for SHA-256 23756a2559a9f25d…

MALICIOUS

PDF

120.1 KB Created: 2020-11-10 14:55:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f6fec459db3ccb20166ce9bf4cbd8919 SHA-1: 82683a093052864e5061cb31cf7fb07c5a2bdbbd SHA-256: 23756a2559a9f25d35c7e48a23177bea0d366b9698a0165db647e20098f95139
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, with several pointing to known malicious redirectors and link farms. The document body, though partially corrupted, suggests a lure related to 'Fo3 wanderers edition', likely a phishing or scam tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/aws?keyword=fo3+wanderers+edition In PDF document text
    • https://lurabesuweki.weebly.com/uploads/1/3/4/5/134524451/jevowigexesegisos.pdfIn PDF document text
    • https://xirunokud.weebly.com/uploads/1/3/4/4/134467368/67bae1ab.pdfIn PDF document text
    • https://vetidemilutuzu.weebly.com/uploads/1/3/4/4/134492936/2130060.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/susopuzupure/vonexusuwexukep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/208545dd-04bb-45ec-a8ef-254eeae56583/cdma_workshop_free_download_full_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e42d995-ca83-42c7-9398-7d02b382cea6/voziteg.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/wedevewutodo.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/7369689258.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f049f104-9ed8-4664-abb1-899eb25c274b/printable_lsu_2020_football_schedule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca915cd7-5016-4d72-9eb7-83d0b56be7df/51207859245.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc500715-81e9-4302-9f03-f06ebd1dbaa8/tubelumuwirifizukizebe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75b9c565-379a-4421-b59f-25edeadbab4d/the_true_gentleman_creed.pdfIn PDF document text
    • https://s3.amazonaws.com/vezosoluvezoj/97614487384.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff878234-a215-4eb4-9ee1-cba09fcc140c/nuzurafamevuru.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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_off00018557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18557 5000 bytes
SHA-256: 9ce2b0e1b3adcd4fd31a2131b15530b42baf5d30b43188855a90d77f9b283a7e
font_01_sfnt_off0001967c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1967C 11368 bytes
SHA-256: edfd1b4061993b83bf39b0aa88d08cfe9ad5d43d29e43037d8153a887254c8c7
font_02_sfnt_off0001bd7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BD7B 16272 bytes
SHA-256: 1ce6ed134e6cf2ebcc57b506eeea3b659f1f15e890c2befc95a2eae97ec264da

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