Malicious PDF — malware analysis report

Static analysis result for SHA-256 83d2bee4cab1ea88…

MALICIOUS

PDF

82.1 KB Created: 2021-03-17 23:49:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 75d05675b8a49d5eda6a0129d69f670f SHA-1: 9526ba178fd68d41710344f02136cf6c608f6c77 SHA-256: 83d2bee4cab1ea8834bbc431a5c65b3bec289bbcba8f838c0807e0a69bdbecdf
126 Risk Score

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 0.9990

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://dafemum.ru/award?keyword=definicion+de+riesgo+psicosocial+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4490128/normal_6005f7cccb4de.pdfIn PDF document text
    • http://metarapuw.mypressonline.com/2919889563.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384851/normal_603d2076ba0fc.pdfIn PDF document text
    • https://cdn.sqhk.co/lanuniwa/h5iclhf/bemotap.pdfIn PDF document text
    • http://zifufarox.getenjoyment.net/animal_cell_organelle_functions.pdfIn PDF document text
    • https://cdn.sqhk.co/gowamojon/chdJAii/rawosemo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365582/normal_601b92c74e677.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381302/normal_6043667f94af6.pdfIn PDF document text
    • http://pixidilivutep.medianewsonline.com/samsung_bd-p1590_blu-ray_player_remote.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453718/normal_603fd2b476d77.pdfIn PDF document text
    • https://cdn.sqhk.co/dorusafe/iaEZja9/bio_inc_redemption_trainer.pdfIn PDF document text
    • https://cdn.sqhk.co/lidesoxu/ijGcLhg/autodesk_3d_max_2014_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://mevomum.epizy.com/backdoor_roth_ira_tax_reform.pdfIn PDF document text
    • http://mazogatu.epizy.com/why_is_my_uniden_phone_not_ringing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/164054c1-9d8f-4c3b-9546-87d43219482e/2014_maserati_granturismo_mc_stradale_specs.pdfIn PDF document text
    • http://malakevuxe.epizy.com/ge_healthcare_logiq_e_service_manual.pdfIn PDF document text
    • http://tuzipani.rf.gd/tibisulovemaxujomawavujez.pdfIn PDF document text
    • https://153f2bed-3501-4ec5-9468-ed1987511f6d.filesusr.com/ugd/f67134_a0dad6eb28394b0b83fadf2d7dd17699.pdf?index=trueIn PDF document text
    • http://zonizuziguzapi.rf.gd/live_sky_sports_tv_guide.pdfIn PDF document text
    • http://zutugidod.onlinewebshop.net/kenneth_e_hagin_healing_belongs_to_us.pdfIn PDF document text
    • https://92923600-264c-4cb8-9d87-181083d4f0d6.filesusr.com/ugd/0bf43f_07090b8267654922a5d0eec963b83a63.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4869607-c994-4b34-b7c4-91f08b3dbadc/the_five_love_languages_for_married_couples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cccd3b1-88f5-4a2d-b8df-d39570b41fb0/22205928095.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54257576-9c4d-4f98-85f9-8285d1d95d08/34369543611.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D8 5032 bytes
SHA-256: efc3fdf865c185441f87a8c37328a1a6cb59736beee27c7f46e690160e264cc1
font_01_sfnt_off000104f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F9 11716 bytes
SHA-256: 87e13c9a04b855bb465dfe11bfa8b6407d7a957487789cabec7096da8d990f0d
font_02_sfnt_off00012b06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B06 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71