Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ad2f996cb00dc0d…

MALICIOUS

PDF

77.2 KB Created: 2021-04-18 11:43:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 7949209841457a466a5b95bf612f4bf8 SHA-1: 4370cc1cf8019efe16812928122259fd3e41a323 SHA-256: 3ad2f996cb00dc0d5696477dd35f5b5858918ae65a4f1d16054b79e1aa86c70c
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many of which point to disposable hosting and are likely used to redirect users to malicious sites. The document body, though heavily obfuscated, appears to be a lure related to a common search query, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://leonvi.ru/strik?utm_term=how+do+i+program+my+ge+4+universal+remote PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377120/normal_604d1f0c58dfe.pdfIn PDF document text
    • https://cdn.sqhk.co/wepunajexiju/agi2Zjh/air_attack_ads_game_online.pdfIn PDF document text
    • https://cdn.sqhk.co/turanexode/gd9idhr/lyrical_video_status_maker_app_download.pdfIn PDF document text
    • http://nagafokom.iblogger.org/4099972622.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367944/normal_601aa243f37ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476952/normal_5fdaf80bd1c00.pdfIn PDF document text
    • http://rebibedo.mywebcommunity.org/how_to_cite_online_apa.pdfIn PDF document text
    • https://cdn.sqhk.co/botonerepap/i2I1Oge/double_dragon_4_ps4_download.pdfIn PDF document text
    • https://cdn.sqhk.co/nabotogemobe/hXIecVe/16615258470.pdfIn PDF document text
    • http://zizaburixakog.iblogger.org/xexukaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473030/normal_6022fc345636f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460255/normal_5ff32f6750ba0.pdfIn PDF document text
    • http://monubagujizud.mywebcommunity.org/medical_fitness_certificate_for_college_admission_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/guvovigo/logical_reasoning_practice_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f33c3bc4-247f-459b-a6a8-1909270a0d57/nujugunokapadufujofu.pdfIn PDF document text
    • http://xamojaxul.epizy.com/numerical_analysis_sauer_solutions_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/hamilton_beach_toaster_oven_accessories.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee1450b2-4621-4256-943d-d96f66a0a3c4/vudevates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/824bc618-41ab-4396-bdcf-30b522f01f6d/85224678977.pdfIn PDF document text
    • http://desorebo.epizy.com/ballet_music_class_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92860538-12e7-4307-8f94-a7ab5253f237/acer_chromebook_15_cb3-532_charger.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ad8465f-1bf9-4c12-9b7e-62ab758c2d84/how_do_you_win_an_argument_over_text.pdfIn PDF document text
    • http://tawowajukamabel.epizy.com/sobifisotesav.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C9 5584 bytes
SHA-256: 9ffe8522b2cf0ce17ef4900f5666df9e8062b43d2c126212a4e8dcc3c88c5746
font_01_sfnt_off000103db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103DB 10188 bytes
SHA-256: da34f6d5359b1b5a46c587a742d9a840e888f1fc6143ab2e00fe121c9ee4b557