Malicious PDF — malware analysis report

Static analysis result for SHA-256 01941d18c580232f…

MALICIOUS

PDF

47.3 KB Created: 2020-11-09 07:46:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: dc226db663bf96864db477182797aa9d SHA-1: 9a87c03f8cfc0f1e4a793678d3105eaa38db7166 SHA-256: 01941d18c580232fec93cfe11ace3b1332052bea98c13cadcbe7e570b7d0a970
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, many pointing to disposable hosting, indicating a link farm or SEO manipulation tactic. One prominent URL, https://trafficel.ru/123?keyword=persona+4+golden+dungeon+guide, is likely a lure or a redirector to malicious content. The ML classifier strongly flagged this PDF as malicious, suggesting it's designed to exploit users or lead them to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/123?keyword=persona+4+golden+dungeon+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366376/normal_5f8757c176554.pdfIn PDF document text
    • https://jijelejo.weebly.com/uploads/1/3/4/5/134590633/5264621.pdfIn PDF document text
    • https://vozekokojexofu.weebly.com/uploads/1/3/4/6/134645554/ginawomajedewe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://vasedaroxito.files.wordpress.com/2020/11/43559079740.pdfIn PDF document text
    • https://tedujetij.files.wordpress.com/2020/11/37343788518.pdfIn PDF document text
    • https://mutozofe.files.wordpress.com/2020/11/65548376527.pdfIn PDF document text
    • https://bafelego.files.wordpress.com/2020/11/forma_water_jacketed_incubator_manual.pdfIn PDF document text
    • https://rezekine.files.wordpress.com/2020/11/tatojesanawav.pdfIn PDF document text
    • https://zosoroxenabo.files.wordpress.com/2020/11/vakolasuduzosemolonedegip.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/cartoon_slingshot_images.pdfIn PDF document text
    • https://zereruz.files.wordpress.com/2020/11/dabodesunomo.pdfIn PDF document text
    • https://teviwuder.files.wordpress.com/2020/11/lofulevusi.pdfIn PDF document text
    • https://manetomimexa.files.wordpress.com/2020/11/68091325827.pdfIn PDF document text
    • https://guwenazepaxu.files.wordpress.com/2020/11/vonopit.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C54 4028 bytes
SHA-256: 5542b4b080e1ee608ae954e9f42ef9d84d445a6d09bba33ae15f632578871c78
font_01_sfnt_off00007a9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A9B 5080 bytes
SHA-256: 93bec1823db375bd8c3cf6e881623fbdd720bbedd368a163785bfbda8f0d2349
font_02_sfnt_off00008bf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BF5 10456 bytes
SHA-256: 71abf0f5fe682262e386071aa5ca9fbb158d48abd694a5c11254d93368f771a8

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