Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccf1e0b523445878…

MALICIOUS

PDF

101.5 KB Created: 2020-12-14 19:46:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 9629ada44aba34ac91735ba1cb9a68c7 SHA-1: 141e2a754c7054545b647f73843d0a8d4818d6ed SHA-256: ccf1e0b52344587884c680fe9fb42ed16ac2bb0f4016348cd39de1c3ea12ad8f
186 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 embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafftec.ru/123?utm_term=histoire+de+ma+vie+branham+pdf PDF link annotation
    • https://konanofekevofi.weebly.com/uploads/1/3/4/3/134367310/7031542.pdfIn PDF document text
    • https://zezevibowavaki.weebly.com/uploads/1/3/4/8/134854125/731641db.pdfIn PDF document text
    • https://fepobiwebefu.weebly.com/uploads/1/3/4/5/134592484/5741007.pdfIn PDF document text
    • https://foxetevuleludo.weebly.com/uploads/1/3/4/8/134859937/dedupuzubadiwi.pdfIn PDF document text
    • https://gudojovevisepu.weebly.com/uploads/1/3/4/3/134314990/sinikelutalumesukit.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/vigirupiruwovilav.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/84486c8a-c5ba-4d2e-97a8-a5025497cf67/luzogapakesujimajiro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be1e3f6a-5638-4a48-97aa-948520708dc9/9502720471.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fd1f6f0-2b3d-4dcf-83e8-7121aa583196/57795060247.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/xexifurafinim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c023a697-417b-4430-b51d-c95f541b0e3e/79011916469.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_off00014d78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D78 5412 bytes
SHA-256: 96aaa22c6036b455f86c4202f011ad6e6b68807ed4987da8baa947458d07236a
font_01_sfnt_off00015fad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FAD 13016 bytes
SHA-256: 9e74cf550428dfc870ac2340b5397585dc5ca07ee566a212e93afec472d38366

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