Malicious PDF — malware analysis report

Static analysis result for SHA-256 982bb53dc10aa436…

MALICIOUS

PDF

82.3 KB Created: 2021-03-18 04:21:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 4a681f66b5b2979a4f95405d2351be2d SHA-1: 3602777eccdda95676510d60031f9238d626441d SHA-256: 982bb53dc10aa436dc28dbab59095931794574c44c3b79efd72908b526ccf288
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with heuristics indicating it's a link farm on disposable hosting. The embedded URLs and document body suggest a lure related to 'data analysis and algorithm tutorialspoint pdf', likely intended to redirect users to malicious sites. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://resalured.ru/award?keyword=data+analysis+and+algorithm+tutorialspoint+pdf PDF link annotation
    • https://gixisisopovi.weebly.com/uploads/1/3/4/7/134713576/dutisikosabiso-gamagikutatiz.pdfIn PDF document text
    • https://vanewuzopawibo.weebly.com/uploads/1/3/0/8/130814706/9965164.pdfIn PDF document text
    • http://workmonster.net/who_was_the_first_european_power_to_gain_a_foothold_in_asia_was_calledgli32.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424647/normal_6006457d678fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374379/normal_601803353472d.pdfIn PDF document text
    • https://gifetapajuloper.weebly.com/uploads/1/3/4/6/134682222/wojan-bovuwulipeguna-raditoxa.pdfIn PDF document text
    • http://pinerapidsrr.com/chauvet_lighting_slimpar_64_rgbadcsk5.pdfIn PDF document text
    • https://zojegidaluvimov.weebly.com/uploads/1/3/4/1/134109086/e9c92e85.pdfIn PDF document text
    • https://zazozoke.weebly.com/uploads/1/3/0/7/130776388/gikinufagikuv-xaliv.pdfIn PDF document text
    • http://dkblogin-de.com/pokemon_the_movie_2000_full_movie_doegaiq.pdfIn PDF document text
    • http://zarabatyivat.ru/zomazaviroxi1fhqf.pdfIn PDF document text
    • https://bunuterujizid.weebly.com/uploads/1/3/4/8/134882333/46b98f4.pdfIn PDF document text
    • https://tidosivapozagul.weebly.com/uploads/1/3/4/3/134390518/kasenulu_sodab_poxavomerawodax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489061/normal_60153156d0d53.pdfIn PDF document text
    • https://salapabozob.weebly.com/uploads/1/3/5/3/135326799/08a86.pdfIn PDF document text
    • https://vogowixikep.weebly.com/uploads/1/3/4/3/134323827/3773341.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389601/normal_6039b1691016c.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/3410f8d6-dfd6-4d69-a7ea-306e3739d7ce/pet_sematary_1989_cast_then_and_now.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7be880bb-4360-474d-9be8-6852f6514119/how_do_i_activate_adobe_acrobat_pro_dc_for_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5537c8c-967c-4a00-a7fe-6ea11a3822cc/cisco_sg300-10mpp_default_password.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ccfe4ae-80ac-4d4d-acc9-ead2d28e7ec1/janimikikivexiris.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41c357cf-ab65-4cf1-9d76-53d0af43ee88/brother_cs6000i_sewing_machine_needles.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_off0000ec22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC22 5556 bytes
SHA-256: e8761955aec72c76e533be84ae078a12dec5aca837fc55c5f6918ff3ea687667
font_01_sfnt_off0000fef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF0 11164 bytes
SHA-256: 2c9280a856b7f5c0b9f42ea9e291c8ad510897a5763712b43bb52ced679add8b
font_02_sfnt_off00012514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12514 16544 bytes
SHA-256: 49230a07578f2a0b108554ff1d47b1cb24b8f8081254bad551c0ce72ea05e0a5