Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef0b47b265f52cc8…

MALICIOUS

PDF

43.3 KB Created: 2020-11-07 03:04:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d3dde53808910b3fd565d09e69552cdd SHA-1: 246bf464732264fe3cc3c7bb175c37337af01f02 SHA-256: ef0b47b265f52cc8dac8a7ffcbd71016fea51bba8adcc7b26bcbca1973fb05f7
134 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 an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffking.ru/123?keyword=reggie+level+editor+next+download PDF link annotation
    • https://pamaridefudeluz.weebly.com/uploads/1/3/0/7/130776324/jifiwaso.pdfIn PDF document text
    • https://lagafuxomip.weebly.com/uploads/1/3/4/3/134347440/nuwipikizon-zuzibadowu-vifiki-nuxepupopam.pdfIn PDF document text
    • https://mibebedobosuv.weebly.com/uploads/1/3/4/3/134322580/baloxu.pdfIn PDF document text
    • https://fetarulezi.weebly.com/uploads/1/3/4/4/134487317/lirazusutisadalu.pdfIn PDF document text
    • https://davobudo.weebly.com/uploads/1/3/4/4/134432622/fulapavilifoge_jufabemirobeza.pdfIn PDF document text
    • https://jarofuzaduse.weebly.com/uploads/1/3/4/5/134502270/3609745.pdfIn PDF document text
    • https://pituluwo.weebly.com/uploads/1/3/1/4/131437949/5498584.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/xizaxamuxive.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/tifuxasorelav-sunagutigu-gikisifexixabot.pdfIn PDF document text
    • http://www.mediafire...2fdrhqrpanuuqc2In 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/8a9b69b1-bb87-436d-bf56-c8a8d735b32d/pomevefe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5b386c9-12b7-4224-9e37-0326f694e6e3/terraria_free_apk_full_game.pdfIn PDF document text
    • https://salemug.files.wordpress.com/2020/11/24868242544.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec789246-a5dd-40c4-a0cd-e3193b75c1de/nipeziginakiwub.pdfIn PDF document text
    • https://nijubar.files.wordpress.com/2020/11/pipewidizibegosepo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e555b7ec-8cd8-4357-865d-1af295c5efa0/31555245801.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_off00006a55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A55 5044 bytes
SHA-256: 1627ed8d544246b4ffa5faa8979d04d9a14223848a28d81907398dc667d89e94
font_01_sfnt_off00007ba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BA8 10620 bytes
SHA-256: 16eba33fa386a5ba7c97fb0cae4fbb1f43c674898d9757ffecd1c479158728d0

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