Malicious PDF — malware analysis report

Static analysis result for SHA-256 46436f6dad53ff99…

MALICIOUS

PDF

97.6 KB Created: 2021-03-14 05:00:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a56920b3e8aab73adf3df836abd313a SHA-1: 189c995567a1c8eaac64da60c11f157eb2da4090 SHA-256: 46436f6dad53ff99c4010769f99c97b1e847f117f3139a557c294721e461400e
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains embedded URLs, with one pointing to a suspicious domain ('soxebez.ru') that is flagged as external. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains keywords related to 'yogyakarta pdf' and application metadata, suggesting a lure to disguise the malicious intent of directing users to a potentially harmful external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • 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=budaya+yogyakarta+pdf
    • https://static.s123-cdn-static.com/uploads/4382790/normal_5fccce11a1c8b.pdf
    • https://xadixolikiz.weebly.com/uploads/1/3/1/3/131380305/60a2d6.pdf
    • http://zugasanuko.getenjoyment.net/majurapogozaxep.pdf
    • http://xalenupom.getenjoyment.net/walozedifinoropol.pdf
    • http://ninomut.sportsontheweb.net/how_to_connect_ihome_wireless_keyboard.pdf
    • https://cdn-cms.f-static.net/uploads/4480889/normal_604927d4452b5.pdf
    • http://blekrossi.ru/numerical_expressions_worksheet_6th_grade5pcz0.pdf
    • https://static.s123-cdn-static.com/uploads/4490917/normal_5ff8580224a33.pdf
    • https://fenatafu.weebly.com/uploads/1/3/1/6/131637570/ef9912e2e7.pdf
    • https://static.s123-cdn-static.com/uploads/4413223/normal_5ffd28f181d60.pdf
    • http://all-casino.xyz/how_to_compute_the_number_of_units_in_ending_inventorywcsph.pdf
    • https://kasivolonu.weebly.com/uploads/1/3/4/6/134688646/gituxo.pdf
    • http://samelike.site/691329130970t2vf.pdf
    • https://kuxiwapanipajof.weebly.com/uploads/1/3/0/9/130969705/pepatavol_wawojip.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bizamesuwepe/best_android_borescope_app.pdf
    • https://uploads.strikinglycdn.com/files/8361cbc3-b7f4-4424-a203-eeae21714585/vovar.pdf
    • https://s3.amazonaws.com/bewibiwat/bemelovalefuni.pdf
    • https://uploads.strikinglycdn.com/files/4a4e3b38-ca9d-419c-8880-6a333584eb14/82312328034.pdf
    • https://uploads.strikinglycdn.com/files/5c685456-6070-4229-9ce8-7dae7b101cb0/taruvabaruloba.pdf
    • https://s3.amazonaws.com/jakujakula/11529745275.pdf
    • https://uploads.strikinglycdn.com/files/f992605f-35fb-4482-89c4-1ec9bd834f8a/76968861538.pdf
    • http://zusaxadixuxot.myartsonline.com/ethnic_conflict_in_ethiopia.pdf
    • https://uploads.strikinglycdn.com/files/d3acc227-c38b-4218-a6e7-edb492977060/9204662491.pdf
    • https://s3.amazonaws.com/petikamov/adrenalina_efeitos.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001375e.bin
161e7eeeb2a104e2a5e0e497d79869a330bebfd18b93a24bcfe7b194c506d145		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1375E 5216 bytes
font_01_sfnt_off00014941.bin
9c203fa57188b50aa6357808a89b8906bd40b84b83d3ee1d8a44f8f54051dd20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14941 15124 bytes

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