Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa624b19725c9476…

MALICIOUS

PDF

83.3 KB Created: 2021-04-01 07:15:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 07280e9b80723d2bde4c486536745a98 SHA-1: d8c3d023a96c33b134ee23d1079abdd40b82488b SHA-256: fa624b19725c9476211dbe119474f03674412342a5a9b7f5d496d5276f034f17
66 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable domains or link farms, suggesting a phishing or malware distribution attempt. The ML classifier strongly indicated maliciousness, and the presence of external URIs further supports this. Although no scripts were extracted, the document's structure and embedded links are indicative of a social engineering tactic to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • 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://maypoin.ru/strik?utm_term=air+force+ones+song+lyrics PDF link annotation
    • https://cdn.sqhk.co/zovaratigu/ji4hiXo/gardenscapes_level_2567.pdfIn PDF document text
    • http://delaem-sami.online/what_is_the_unit_of_enthalpy_change_of_solutionia6fk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490754/normal_60648c9a5f868.pdfIn PDF document text
    • https://cdn.sqhk.co/pijujuweg/ghjf1ib/42578736282.pdfIn PDF document text
    • https://cdn.sqhk.co/xurajalijok/EijhgSk/teacher_assistant_pay_rate_wa.pdfIn PDF document text
    • http://xuxetosufuzo.getenjoyment.net/falipobazofudutozoseba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476133/normal_5fda47d13b126.pdfIn PDF document text
    • http://kozugufasuroti.mygamesonline.org/93723351368.pdfIn PDF document text
    • http://save50.pro/intervals_of_concavity_kuta_software_answers7btwe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480581/normal_604ed758ad868.pdfIn PDF document text
    • http://copyright-securityx.com/acronis_true_image_2017_full9j0ip.pdfIn PDF document text
    • https://cdn.sqhk.co/nutakurij/idPVGhi/74781334585.pdfIn PDF document text
    • http://lotobajigufar.mywebcommunity.org/xutazefujezenikegirezaxa.pdfIn PDF document text
    • http://trynutra.shop/691666622321a144.pdfIn PDF document text
    • http://secureappeal.com/la_gallina_degollada_horacio_quiroga_completodpya4.pdfIn PDF document text
    • https://cdn.sqhk.co/zifiguwosu/CheHheg/give_me_the_number_to_yellow_cab_please.pdfIn PDF document text
    • http://farexirofabi.22web.org/soparafidorek.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://popofisofol.myartsonline.com/breeders_cup_entries_2020.pdfIn PDF document text
    • http://nibopinalilabaj.onlinewebshop.net/linajes_y_blasones_de_galicia_del_padre_crespo.pdfIn PDF document text
    • https://b70645e9-42d7-44c6-80f2-f165c8819e8d.filesusr.com/ugd/3f1130_67d7d353228943ea8222899238d32111.pdf?index=trueIn PDF document text
    • https://76c9fb28-c10e-4950-85be-37de24a2ede8.filesusr.com/ugd/fa32a6_670f714c241e4b33a7f1daf9c1a52274.pdf?index=trueIn PDF document text
    • https://be9c8297-50e9-4ec8-be22-7cc4068ef96a.filesusr.com/ugd/fc3b0b_d83a454f553646849224fb9209169a31.pdf?index=trueIn PDF document text
    • https://064d663d-f6b2-44cf-a6ad-083da5f315e5.filesusr.com/ugd/77eba6_99b9262637844d4cab8b5deb4174659c.pdf?index=trueIn PDF document text
    • http://barivigafijamub.epizy.com/87126104175.pdfIn PDF document text
    • https://0a3c8164-ddd9-4522-8472-457ce31ece15.filesusr.com/ugd/d32f78_565d33c128d047d8b249a567000fc324.pdf?index=trueIn 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_off0000fb46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB46 4640 bytes
SHA-256: 44e3192b620cbb5efdd4eceb1acaffd2e2fd623d78d246fc807002c35befb771
font_01_sfnt_off00010b12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B12 11244 bytes
SHA-256: be8e6762166c08a5170014c441f02245768fa1112ecf7b89471a762e7e171b8c
font_02_sfnt_off00013147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13147 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3