Malicious PDF — malware analysis report

Static analysis result for SHA-256 30f45b0e3f15ff45…

MALICIOUS

PDF

78.8 KB Created: 2021-03-31 04:28:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 8e95afb294fe4b9caadd3c5f202d3bef SHA-1: c109cc8df05c4a1ee65e5867fd35e888341ee77f SHA-256: 30f45b0e3f15ff453fa751ee0f9a079c9a2869c2460cf6bf6b5a34acb992323c
66 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a primary focus on 'https://golowaki.ru/123?utm_term=autodwg+dwg+to+pdf+converter+online', which is flagged as a link farm on disposable hosting. The ML classifier strongly indicates maliciousness, and the presence of external URIs suggests an attempt to redirect the user to a potentially harmful site. No scripts were extracted, but the overall structure and URL usage point towards a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://golowaki.ru/123?utm_term=autodwg+dwg+to+pdf+converter+online PDF link annotation
    • http://gekenig.mywebcommunity.org/complete_ielts_5_6._5_teacher_s_book.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477649/normal_604494837882c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486037/normal_6051295adc944.pdfIn PDF document text
    • https://cdn.sqhk.co/joninopi/jjf2jha/minecraft_pixel_art_easy.pdfIn PDF document text
    • https://zadivodewereb.weebly.com/uploads/1/3/2/6/132683121/takijibiwun-ponavoxus-joxuwaso-refili.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416504/normal_5ff6bf61b5e9f.pdfIn PDF document text
    • https://cdn.sqhk.co/mifijizudi/jef2FYS/battleground_survival_apkpure_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450504/normal_5fe95cac50e7c.pdfIn PDF document text
    • https://wilukogata.weebly.com/uploads/1/3/5/3/135388132/1783754.pdfIn PDF document text
    • https://divisekul.weebly.com/uploads/1/3/5/3/135347680/garuzozesavig.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/belapawerezuju/akc_temperament_test_evaluator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e3614ff-92a4-49ff-a92c-8d2381b2e6ba/an_argument_in_which_the_conclusion_essentially_restates_the_premise_is_an_example_of.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7d21444-7ac7-4c81-b5aa-631c1cb03aa7/everybody_lies_house.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/lecture_8_chemical_bonding_ii_worksheet_key.pdfIn PDF document text
    • http://vafitinupisojud.onlinewebshop.net/japanese_verb_dictionary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57da116d-54a3-46fd-b7f8-d75146e33c6d/vector_calculus_outside_of_physics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e32cd5ae-9483-46b6-8909-8f5e820bcf2a/who_is_the_minister_of_community_and_social_services_in_ontario.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/nagimitolokenazo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ce09896-9355-4155-a708-9d01d78002bd/rodipuzurox.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_off0000e113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE113 5076 bytes
SHA-256: 6bcfa85d165ac3d83e3fab67d0afd9c9c12b8cf38536693c2059d882f7826ba2
font_01_sfnt_off0000f284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF284 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off0000fb12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB12 22028 bytes
SHA-256: e7848cab502693529c0b2f14e9973c3841aca5be98fbffaa1a3b48be45a441c9