Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbcec4229e9e933b…

MALICIOUS

PDF

51.9 KB Created: 2020-10-27 01:01:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: d9c597701093fd760170b1c87f6f009a SHA-1: d2ebbf3ae47751638007a647a69907283900d9b2 SHA-256: fbcec4229e9e933b9d6adf412e488242794e17b575b95cfb368f9a07cef21182
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and 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 1.0000

Heuristics 4

  • 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/strik?keyword=a+simple+map+of+ancient+mediterranean+countries In PDF document text
    • https://rosikotukixaru.weebly.com/uploads/1/3/4/3/134312973/lalova-zemab-dilitilusiw.pdfIn PDF document text
    • https://doxorovovo.weebly.com/uploads/1/3/4/4/134479089/xisezonog.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/dbbd04.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/d6357c13-8748-4ef7-9744-28d6513868d4/91626935292.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/29014606662.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/wuvogapaxawosulemugiga.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/79990519546.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/rexudunafiwufewakiduzujap.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/bodyweight_workout_crossfit.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/dinemogetapodolelanu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c9976c9-5237-4156-859e-0dbffb1259e5/suxikatas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5e59e24-a7a1-42db-9bfe-2eccd806048c/lonejededali.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d19abcf6-d5bd-4d1c-94e2-95b038349bc9/punarajizo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4f99133-7967-42a4-b89e-e57ddc3c7cd2/gujuwitupopu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/214af86c-7733-4685-937f-78077bbe6358/46216111526.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0152b0fd-8498-4e3e-bc34-b37363b13c1f/sistema_mexicano_de_alimentos_equivalentes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d3c0d38-4ede-457f-9e34-cbc9469a9d71/serilifefebanud.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_off000089de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89DE 5288 bytes
SHA-256: 9b26e4c9f874fc6f95dc981b1e3ff96e4b249a95b1ce4eb8169567a16ecc6ca9
font_01_sfnt_off00009bb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BB5 11452 bytes
SHA-256: e39c9b144489e3fee7ea3deee7349b495d0fcd9bd6f18e878cc559e992121db5

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