Malicious PDF — malware analysis report

Static analysis result for SHA-256 de54f7fca4e00f84…

MALICIOUS

PDF

116.1 KB Created: 2021-05-10 23:34:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: d06749a32cb0295fc14922593e3b0e87 SHA-1: 20e6d181aa56288e7a2072c938f3fcd99895d5e4 SHA-256: de54f7fca4e00f84cfde5252002d4ff83813c328803baef5ab7d90781a13c260
66 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable domains or use redirectors, indicating a link farm designed to lead users to malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs further supports this assessment. No scripts were extracted, but the document's structure and embedded links suggest a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://ponafet.ru/strik?utm_term=what+is+the+theme+of+antigone+play PDF link annotation
    • https://cdn.sqhk.co/jopubelo/4Egf1hb/46058521452.pdfIn PDF document text
    • http://javifimawa.mygamesonline.org/audited_financial_statements_sample.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447487/normal_5fcc231d3de24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474445/normal_604db2c7ba2ce.pdfIn PDF document text
    • https://xuboxale.weebly.com/uploads/1/3/1/4/131452808/bosab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416501/normal_6038cd266612d.pdfIn PDF document text
    • https://cdn.sqhk.co/jenetuwuda/icGiico/prestonplayz_logo_minecraft.pdfIn PDF document text
    • https://cdn.sqhk.co/xosuridasago/MPgjhio/zigowolasimel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487192/normal_6038bb6e0d031.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451047/normal_5fc9e8c068053.pdfIn PDF document text
    • http://tamigome.scienceontheweb.net/cg_vyapam_patwari_result_2020.pdfIn PDF document text
    • https://fagisidide.weebly.com/uploads/1/3/2/6/132682833/6b5b02e1117b0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://73808e0e-d5df-4584-b63e-1552d949bc0c.filesusr.com/ugd/8d2ea6_c5a10272a2d44fe4a78c4e0a8ace79ba.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/46ead0e8-15ac-4497-b71d-c7105be70e49/how_to_use_nikon_d40.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e9bc209-f0c7-4576-845e-dc83095170f1/why_do_i_feel_like_my_relationship_isnt_right.pdfIn PDF document text
    • http://palexibibiw.atwebpages.com/juxivejejebibet.pdfIn PDF document text
    • https://68420551-d949-41c4-975b-2ae86aa6d062.filesusr.com/ugd/09c3c7_2ff1a0d620ff46aaa3d68c9af0f6709c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfe01629-3e3b-43ce-be40-afa80019a29a/fisher_price_jumperoo_age_limit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1b993fa-3c0d-41e8-b664-803b0f241be7/3077049531.pdfIn PDF document text
    • http://fejonaxi.myartsonline.com/gejasokijumafarumuboje.pdfIn PDF document text
    • http://pavafisufopu.myartsonline.com/35955560671.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49e95109-08dc-40b4-8640-08afc9fdf851/firehouse_sub_calories_italian.pdfIn PDF document text
    • https://15319a82-8c66-4906-b3c2-464277991f2b.filesusr.com/ugd/070acf_5f7bc04b63394e9ca486d0fc3a957fd6.pdf?index=trueIn 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_off000164a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164A5 5332 bytes
SHA-256: b24a467e324dafb52d580ee71f5844ce6486c85b74b8b7e469bca48ab5100d8a
font_01_sfnt_off000176c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x176C1 14656 bytes
SHA-256: e1e5573ddbcedd3314bd0c4b82973f967956501cdb82dd9bcc4b7270952ae80d
font_02_sfnt_off0001a344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A344 18968 bytes
SHA-256: cf418c9bc7bc580a4a1a4a4f5cfc18b1b6211711cb61a2b061823f14a27ccd7b