Malicious PDF — malware analysis report

Static analysis result for SHA-256 04e69c92d8406adc…

MALICIOUS

PDF

85.0 KB Created: 2021-03-25 15:11:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 2f9cbd4eebc596a8c3ee7dfb1441b859 SHA-1: ff2d16cac95948b01776b3afc52dd00481b887fb SHA-256: 04e69c92d8406adc4854cdf238c56ddf251365d92a0e4a4d5ecdfd0d63294363
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious content. It contains numerous embedded URLs, with a primary focus on directing users to download mobile applications, as suggested by the URL parameters and the 'spades mobile apk download' text. The presence of external URIs and link farm characteristics points towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/wix?keyword=spades+mobile+apk+download PDF link annotation
    • https://cdn.sqhk.co/zuvutose/w4gcide/waraxeratibiro.pdfIn PDF document text
    • http://adachivia.store/what_to_bring_to_dmv_to_get_your_license3iv53.pdfIn PDF document text
    • http://7lessons.space/7538694864lrmds.pdfIn PDF document text
    • http://dashcamtopbest.com/famorv0vfq.pdfIn PDF document text
    • https://cdn.sqhk.co/vuvapolaxaj/jbUhUaf/cold_agglutination_test.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491665/normal_6041eb256b378.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380072/normal_60545b84e66b1.pdfIn PDF document text
    • https://cdn.sqhk.co/zepinima/jg9jec6/neo_scavenger_wiki_3_dog_moon.pdfIn PDF document text
    • https://cdn.sqhk.co/fusajovogi/kJV8hhx/92121970528.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469617/normal_5fec0efe3ca6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476577/normal_600a47338f238.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419822/normal_5fcc6f3c37e18.pdfIn PDF document text
    • https://cdn.sqhk.co/keserina/ibyCOjd/minecraft_build_battle_server_address_pc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f482ba6-70fe-42e7-a13a-57ce95108591/97474185553.pdfIn PDF document text
    • https://8d59741e-369e-44be-b01e-8fbcb09d2d01.filesusr.com/ugd/7cefa9_a2b66e81b34c4a8f930a0e0f85783d5d.pdf?index=trueIn PDF document text
    • https://c145ee04-3c3b-4786-8b94-e0511401b322.filesusr.com/ugd/de65f7_e871aeca7d4a4670a0bda5234dbfd189.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vanatul/rapegudofubako.pdfIn PDF document text
    • https://5405d108-7f1e-482b-a10c-e06f62b7505d.filesusr.com/ugd/d941b1_6c1096521d164d05a727c59881666eb2.pdf?index=trueIn PDF document text
    • https://6f8cb219-4830-455d-9ced-b55e65700e85.filesusr.com/ugd/fd30ac_fba9f262c52d4769ac09315e39beae54.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/63f74f19-a8a5-4884-bf0f-1e70484d2b7e/fituwave.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/lewebeweve.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/free_html_css_templates_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17f2a857-d49c-4a6a-8d69-e1cb8ab532ee/ti_nspire_cx_cas_student_software_activation_key.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/winpe_bootable_iso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce5c4ab2-8b56-42a2-9489-b434fbd552d3/zosat.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
    • 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_off0000f7e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E9 5408 bytes
SHA-256: da9ae58a5ccc874678001497114064ec3d0d2055594553d00f0d3bcd5725a1cc
font_01_sfnt_off00010a4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A4B 11408 bytes
SHA-256: fcf16fc87e1dd2fc9222563edae756bd83048868ab344369511866146fa6a3b0
font_02_sfnt_off00013169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13169 16092 bytes
SHA-256: c9557d91917e40dbb2ce09b7ef560a04a9a832ffe2ebcac6b50408a58351272e