Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bb3f7f26a030396…

MALICIOUS

PDF

77.9 KB Created: 2021-03-24 21:45:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 61c44c5bb9dda89e0c6e245253e7d5bb SHA-1: d3150a52b0751afbbfdc06054b8b70903d988350 SHA-256: 1bb3f7f26a03039690af57f9c996f0b1a20e04c4d001131173e4883e6ed14fa5
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a significant portion pointing to disposable hosting and exhibiting link farm characteristics, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of external URIs like 'https://golowaki.ru/wix?keyword=honda+hrx217+shop+manual+pdf' indicates the document is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://golowaki.ru/wix?keyword=honda+hrx217+shop+manual+pdf PDF link annotation
    • http://netlysy.online/satekedoroguzapipiluvowe2nec.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonotiso/jfgijfz/screen_lock_time_password_app_download.pdfIn PDF document text
    • https://cdn.sqhk.co/supetudoti/iaejhib/fix_the_sentence_worksheets_3rd_grade.pdfIn PDF document text
    • https://cdn.sqhk.co/zilidadakole/fqibSje/download_streamer_life_simulator_mod_apk_android.pdfIn PDF document text
    • http://italiahot.space/domain_and_range_activity_4_answer_keyq3lgr.pdfIn PDF document text
    • http://teatr-art.com/97360810122f3cbr.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzitomizaj/4jdgeij/zotusirizid.pdfIn PDF document text
    • https://cdn.sqhk.co/dikapagoloza/ibhesgh/kb200-_01ss_cut_sheet.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/3a6f1d6e-b9bb-41a7-a50e-09efe35922c9/boss_fs-5u_momentary_footswitch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44e1fdc8-7109-4061-b7a9-8a457755c399/how_to_illustrate_hair_in_procreate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d2c386c-452c-4ecb-9242-947d1afe6c5e/how_to_strengthen_your_gluteus_maximus_muscle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/194e1345-9068-40b4-972b-662f353ae715/nalizufedukej.pdfIn PDF document text
    • http://kasegek.rf.gd/bms_application_form_date.pdfIn PDF document text
    • http://jimabepur.rf.gd/3396093683.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1297beca-dc7b-4cad-8b2d-afa1c960b718/linksys_ac1200_dual-band_gigabit_wireless_router-_ea6350.pdfIn PDF document text
    • http://laxojidosap.epizy.com/vauxhall_astra_2011_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/zevibimiki.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/2882896887.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0148cd1d-db4a-46b9-b939-b668df4306fa/mt_san_antonio_college_payroll.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d70d453b-4ed5-4f97-b364-f9e05d579e41/what_are_the_research_methods_in_educational_psychology_discuss_in_detail.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e377651f-9dea-494d-9b64-098bb8d9cabf/craftsman_5.5_hp_30_gallon_air_compressor_regulator_parts.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_off0000e838.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE838 1728 bytes
SHA-256: ad771dd3d328ad95d3e96291aa4712d55a90f16a6de757dd532bbec02ad074bf
font_01_sfnt_off0000f0c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C8 5572 bytes
SHA-256: 31a4ba16cf328e58bbc83702929ffdb35671e2c44219f5dcc0e0f9ae35447c97
font_02_sfnt_off000103a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A0 11352 bytes
SHA-256: 3574cd4b20b4228c0075663bd5f2426873359b43b260be041fe84c2d9f1f152c