Malicious PDF — malware analysis report

Static analysis result for SHA-256 05bba9cedc615893…

MALICIOUS

PDF

82.3 KB Created: 2021-03-18 14:28:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 54846fecf300c724e372de21bcf2d417 SHA-1: 85fe5e6598788ef47df3bcaf32ebeebb062e8660 SHA-256: 05bba9cedc6158930d53e8068a44309b4df397476bc697a1cd75968f892bc22a
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 0.9991

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://midufefew.ru/award?keyword=orientation+du+def+2020+pdf+mali PDF link annotation
    • https://cdn.sqhk.co/fowoleleda/ijdkBts/classical_ballet_music_for_class.pdfIn PDF document text
    • https://cdn.sqhk.co/muresogus/crhiOih/7232635778.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369313/normal_60015e29cbd39.pdfIn PDF document text
    • https://cdn.sqhk.co/nogorodizet/4w6xjfL/32786953904.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415525/normal_60094f0d6878f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446388/normal_604e655488196.pdfIn PDF document text
    • https://cdn.sqhk.co/bejamisokepu/ejeLKqz/63429976.pdfIn PDF document text
    • http://mizusugazalu.22web.org/44381369809.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404299/normal_6034f3c585423.pdfIn PDF document text
    • http://bawitog.iblogger.org/kafetezezaromimexuvugedi.pdfIn PDF document text
    • http://mibikazut.mypressonline.com/fojitefejamabupanuzosikul.pdfIn PDF document text
    • https://cdn.sqhk.co/talexadu/ae3EFWt/master_archer_trainer_skyrim.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://runuwug.myartsonline.com/66000372834.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/m._c._v_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/vanatul/el_amor_en_los_tiempos_de_colera_en_ingles.pdfIn PDF document text
    • http://nijuxejo.epizy.com/977133111.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/17914144302.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/kingdom_hearts_2_official_strategy_guide_download.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/dell_inspiron_3646_solid_amber_light.pdfIn PDF document text
    • http://wegizadix.rf.gd/ungers_bible_handbook.pdfIn PDF document text
    • http://lepiwapugu.rf.gd/ludwig_s_angina_guidelines.pdfIn PDF document text
    • http://ponogifivow.epizy.com/6874547601.pdfIn PDF document text
    • http://pamigiguwilel.rf.gd/49979459595.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_off0000ebf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF4 5308 bytes
SHA-256: 23c281596a23adcbeb8be307a9298a5796a441a7074fc9f0776e522286559edb
font_01_sfnt_off0000fde7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE7 12064 bytes
SHA-256: 835722efaf5ff3c41f8c38339e789eb73b2e6632d4f0829573a08ff8b95e32be
font_02_sfnt_off00012414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12414 16204 bytes
SHA-256: 31aa257675234f953cb39254c73a0c002637764ec2691c470e0912636c3685cf

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