Malicious PDF — malware analysis report

Static analysis result for SHA-256 27070e3cc8d401b3…

MALICIOUS

PDF

73.7 KB Created: 2021-04-02 17:42:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 2968a418a76818244778a33bc2ff118a SHA-1: 577f4a449169e60288bd452dc10dd4c506d7604e SHA-256: 27070e3cc8d401b38359dfb12e458082cb2acdbd0b9c4be06a7d7edf684de168
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 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 0.9998

Heuristics 5

  • 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 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://soxebez.ru/award?keyword=webarchive+to+pdf+windows PDF link annotation
    • http://fiwisud.getenjoyment.net/attestation_d_inscription__un_stage_de_formation.pdfIn PDF document text
    • https://bifupepazabar.weebly.com/uploads/1/3/4/7/134740405/dijivaxoxudeko-ganogozek.pdfIn PDF document text
    • http://xovonakajo.22web.org/19840213857.pdfIn PDF document text
    • https://vidolatukala.weebly.com/uploads/1/3/5/3/135316506/jemib_dufumujev_nozomezefudisu.pdfIn PDF document text
    • http://tuwukadinem.mygamesonline.org/93717818339.pdfIn PDF document text
    • http://fudoviwil.mywebcommunity.org/begin_the_beguine_artie_shaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://diwesetudu.epizy.com/84654669440.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/341fde25-961e-42ec-93d2-1f525ae0cfa4/how_to_set_up_my_jawbone.pdfIn PDF document text
    • https://67dc9804-4028-4298-afd7-d431d2c16fe6.filesusr.com/ugd/559c84_5be6b19894274cb8960b19208006ce64.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bbbecec-f2f2-478e-8c59-5a3c94342129/dewalt_bench_grinder_wiring_diagram.pdfIn PDF document text
    • https://0793e221-2e7e-4176-aae8-4ff4b75d8f7a.filesusr.com/ugd/64bd79_5db7ca9aeade4165895d39eb5489390a.pdf?index=trueIn PDF document text
    • http://jiminoxesovibin.epizy.com/basic_of_sql_queries.pdfIn PDF document text
    • https://b86313a8-447b-404d-ae6d-bc69740d899e.filesusr.com/ugd/e54fc7_bd4147bd22ec4dfcbed0634dd1a870b9.pdf?index=trueIn PDF document text
    • http://bumerezuwo.epizy.com/vanilla_sky_hollywood_movie_free.pdfIn PDF document text
    • http://janepalefudu.epizy.com/avery_label_templates_5395.pdfIn PDF document text
    • https://69868269-04aa-4a0d-8379-1371762fd556.filesusr.com/ugd/d8beff_ddad4d7d04fc4eb3bd2de21fcd4baf1a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/54540a26-7841-4c51-af1d-ad32a2a5fc42/42528775794.pdfIn PDF document text
    • http://patubakofizoz.epizy.com/purple_cow_fairmont_hot_springs_bc.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_off0000e291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE291 5516 bytes
SHA-256: ecec62de017d91977aacc528143d3a93c6cde4de1a5ade109bde0b7045a9aa63
font_01_sfnt_off0000f567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF567 10840 bytes
SHA-256: 120796c721345b8adebd17b01f7f64ac345681aeebc95cae8fe37bede339dd15

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