Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5bc76e4571fb67b…

MALICIOUS

PDF

61.1 KB Created: 2020-11-23 14:57:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: fbbf52f61cfce7d2aa7ae6bc70f1f929 SHA-1: b2259a8950879822eb8f01875855065c8cb58062 SHA-256: b5bc76e4571fb67bf201cc6325d8daed46cb2d6e9ee50cee4dc60a93919b1d80
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 0.9996

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://cctraff.ru/123?utm_term=west+covina+city+hall+planning+department In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5f928dcb99eb3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5c09522-52a8-4d1f-8185-8d49bf3ce294/faststone_registration_code_9.1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4289a311-22a1-45a9-93e8-7c772ac2c046/balloon_tower_defense_5_unblocked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9a5f33e-510e-4dc6-ae1d-9ffad6c5f3ed/8933298324.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05bdb910-0ac7-469f-a9fc-e1bfdce23ca8/nesuwopivelowemimi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f58b9321-d829-4854-b706-c90628ea0918/arma_3_dynamic_missions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a31f837a-f903-4677-8a93-3060f81ac9b4/92749806064.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10647a44-b754-413f-803c-bfebe17c2f90/find_oath_ticket_finder.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b102efc-9d1e-4b31-8b52-3baf0b7900bf/baligokalizisagupisej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf8ed7f2-0fa0-4f43-b781-10b75b284890/name_of_p4o10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6762db9-17a4-4978-b1cf-48f9bc45db81/zevafomuzegirafo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dcdce9c-d9d8-4b89-9393-17aa0b5c05c7/66803734645.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24f0d1a2-b182-4c3e-85bf-0b6ccdfaf6b6/a_nascente_ayn_rand.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56ea6c88-ff8d-4dec-b92a-883ca277b1ef/kajubifipon.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_off0000b1c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1C1 5664 bytes
SHA-256: 0268bf64fd30f0cb0a5dd24789b994784cb479ccefe42644789ba5a882bd0080
font_01_sfnt_off0000c4f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4F5 10044 bytes
SHA-256: e1ace032d3383cdc38aaa568fd967b9ae164aafc15dde13e1fb4507923037cd1

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