Malicious PDF — malware analysis report

Static analysis result for SHA-256 f52bd8062fff4967…

MALICIOUS

PDF

99.0 KB Created: 2021-03-12 18:13:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 41234d6a36f448c254d5f02103b9e59a SHA-1: 90109e41675ba9df02ade545463883a15333c844 SHA-256: f52bd8062fff4967aa1751cef97144ec91c8082e08e30aac4d2e3c93265acb96
126 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 and are flagged as part of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://zajinet.ru/award?keyword=ayat+ayat+ruqyah+pengusir+jin+dan+sihir+pdf PDF link annotation
    • http://nomenowunesazoz.scienceontheweb.net/how_do_i_change_my_router_admin_password.pdfIn PDF document text
    • http://ruluzuzadol.mypressonline.com/wedasadasidep.pdfIn PDF document text
    • http://fibaxoxadomi.sportsontheweb.net/sennheiser_ew100_g3_handheld_manual.pdfIn PDF document text
    • http://dajexori.mypressonline.com/safety_measures_in_construction_site.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391326/normal_60227457da137.pdfIn PDF document text
    • http://vertitribe.store/902541667222j8lj.pdfIn PDF document text
    • http://podarokinsta24.online/lidakamq1333.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455370/normal_5feff45738bed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424933/normal_601bf8fc25df3.pdfIn PDF document text
    • http://harkateine.fun/667733279343668u.pdfIn PDF document text
    • http://reduslim-europa.site/baxotejogegofumukonepuxemmnag5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476135/normal_601ba363aa706.pdfIn PDF document text
    • http://instofficial.online/monster_island_2004_full_movie1ee4p.pdfIn PDF document text
    • http://logmeinnow.xyz/kokawaguxovsg23i.pdfIn PDF document text
    • http://dogalijun.scienceontheweb.net/why_is_there_a_jumper_wire_on_my_thermostat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471109/normal_600b12c8c0f38.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/a19059f8-ee3f-4e41-99a0-b54ea0abd7b7/kasugowezilikagabojowoz.pdfIn PDF document text
    • http://rodexiguv.onlinewebshop.net/debitupuwomipo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c43624c-5457-4651-a387-09cc1f344818/without_conscience_chapter_summaries.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcbd2480-262a-41a7-a00e-0f9f67d7d4f1/34131829937.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0001422b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1422B 27296 bytes
SHA-256: 9f69212afcc0733513e3a8b6d5288237b40667d95d0afe4e2e0d30a44edd967e
font_00_sfnt_off0000ff02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF02 3104 bytes
SHA-256: cd4349afe2f1af5047d9e772e55779f1bf6afbcd6af77b70489873e28f2b828b
font_01_sfnt_off00010a15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A15 5564 bytes
SHA-256: 42d776bd932dedcaed0ef84b70036b79a02dc320965d67a322ef34668d00a5d1
font_02_sfnt_off00011d03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D03 11440 bytes
SHA-256: 5b435c243446069210471ac4a2782072dbb33c232427005418d3387b69b2dbbb
font_04_sfnt_off000173dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173DD 2300 bytes
SHA-256: 2388719c83358ef0875ab98de3bf453d3947ad50422787e84fd4b441d869dafa