Malicious PDF — malware analysis report

Static analysis result for SHA-256 04f5a664f11c7430…

MALICIOUS

PDF

52.8 KB Created: 2020-11-08 07:28:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a6e16cf10b867edbaf265311e3177b1f SHA-1: d20c447fd23bc1c7d4989980a41763041b6c241c SHA-256: 04f5a664f11c74302b10167ca1f3001b7b97b71e7b03d9b3712dddbf8f2b7606
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

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://traffine.ru/123?keyword=naruto+x+boruto+ninja+voltage+hack+tool+2019 PDF link annotation
    • https://zafojepomekosax.weebly.com/uploads/1/3/4/3/134352399/2dcf2528687f9.pdfIn PDF document text
    • https://xixunogada.weebly.com/uploads/1/3/4/3/134343035/47f069.pdfIn PDF document text
    • https://bizetuxerupa.weebly.com/uploads/1/3/0/8/130873791/9109322.pdfIn PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/totewojet.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/06d0efcd-45ed-4dc9-8439-1ebf0da600cd/zeponoralakisoperevili.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e937167-73c5-4b68-af87-cc80112af9b7/77639261403.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/capitalism_vs_freedom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd1c8399-6024-4ae1-b090-ab4dc134ca38/50_state_legal_catalytic_converter.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/vaserokasovu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07850918-83c0-4215-84e9-9a9a0f8699aa/suwesefaxadigakonedit.pdfIn PDF document text
    • https://xuwobuf330498001.files.wordpress.com/2020/11/zefefozo.pdfIn PDF document text
    • https://xasuxedizos.files.wordpress.com/2020/11/feg_hungary_shotguns.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/xoduropomegalawum.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71C9 5740 bytes
SHA-256: 771823ad09242ab7561b0cb72f79022c377f09d15e8bfd7c7369308dedea5e27
font_01_sfnt_off0000856f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x856F 9860 bytes
SHA-256: 48e5255d9a59fe800ec1c63c6de3d215db51f3f1319c3a494066d71562d6c345
font_02_sfnt_off0000a7a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7A2 19140 bytes
SHA-256: af4e9594d0faa59e33d827bce228ae5fcf5c231a43c564f5372430b52300f62a

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