Malicious PDF — malware analysis report

Static analysis result for SHA-256 e467363d2e7bdb5b…

MALICIOUS

PDF

45.5 KB Created: 2020-11-08 09:33:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3a7a01628f4324debb4493261c58e918 SHA-1: df38a41b0b994dbeeb903f9762530252a31fa552 SHA-256: e467363d2e7bdb5b189891fffc10087d736c6503361029d7d9d90f3b62475151
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=understand+contract+law+and+you+win+reviews PDF link annotation
    • https://mojenosude.weebly.com/uploads/1/3/1/3/131382274/motirala-vepojivoral.pdfIn PDF document text
    • https://jumabesabixoduz.weebly.com/uploads/1/3/4/3/134368642/joxitobotorajifefiv.pdfIn PDF document text
    • https://bilemupu.weebly.com/uploads/1/3/4/6/134654663/xurol_pirowexe_wirubutivog_tojixozive.pdfIn PDF document text
    • https://pakezumada.weebly.com/uploads/1/3/4/3/134368128/tuderosovaxugiwutim.pdfIn PDF document text
    • https://kuromazu.weebly.com/uploads/1/3/2/6/132695519/3f5f1f5bc36cd9.pdfIn PDF document text
    • https://lujadogube.weebly.com/uploads/1/3/4/5/134522393/85390fda90.pdfIn PDF document text
    • https://nunebavakagepas.weebly.com/uploads/1/3/4/4/134446468/mirosu_nejuzowemajaj_rixatijiwigebi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://tosigipagop.files.wordpress.com/2020/11/difference_between_hsrp_vrrp_and_glbp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39b2b32c-be9c-4621-bbf1-b18e350ed1a9/85031110123.pdfIn PDF document text
    • https://s3.amazonaws.com/suzeduselu/68855463309.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/breast_implants_before_after_guys.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/145a1fa7-e48f-4ca1-a01e-ad65876ac826/kakashi_kills_rin_episode.pdfIn PDF document text
    • https://kevalogakuki.files.wordpress.com/2020/11/45794239449.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd093d9b-5cde-4694-9d69-58d05d7c932f/53214214423.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_off000066d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66D5 5060 bytes
SHA-256: bb214e8f3fce84e5c802845edf6d60111c1bdc682883a2f06ec4ba2775bf5943
font_01_sfnt_off00007827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7827 10232 bytes
SHA-256: 2dc205a89edf923344fc2930a30bd863361ef1694091d961d86cf61b2bf34746
font_02_sfnt_off00009ab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AB3 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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