Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e13621d95f1180f…

MALICIOUS

PDF

93.9 KB Created: 2021-05-28 16:02:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: e305dc74cddf7621025124e94aef9d74 SHA-1: e35ba4e92cd4b42c193022825039680c3334416b SHA-256: 6e13621d95f1180fc5a3415c4e6d340ab5af9c9758ff211aa35875f17c184674
156 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it's a PDF containing a large number of external links, a common tactic for link farms. One of the primary external links, 'https://seumenha.ru/strik?utm_term=blue+eyed+devil+pdf', is flagged as suspicious. While no scripts were explicitly extracted, the PDF structure and the presence of external links suggest an attempt to redirect users to malicious content, likely for phishing or malware delivery.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/strik?utm_term=blue+eyed+devil+pdf PDF link annotation
    • https://ruzisatof.weebly.com/uploads/1/3/4/7/134734885/xovar-suliwuxekixu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454052/normal_60180a2f78050.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500678/normal_605d6c7c96cd8.pdfIn PDF document text
    • https://mivojunap.weebly.com/uploads/1/3/4/7/134720575/1176171.pdfIn PDF document text
    • https://mivewuwadomabat.weebly.com/uploads/1/3/1/6/131606259/dimimozupime.pdfIn PDF document text
    • https://turumokapitaka.weebly.com/uploads/1/3/4/6/134613572/4977648.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/d73e32a1-4baf-4575-9e2a-2a6c532120a0/how_to_dm_a_one_shot_dd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1683c5b-de7d-4a39-9907-fd4a7af9d93f/16291248068.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b4482da-d42b-4050-bda1-8a631e784bd2/how_to_ease_meralgia_paresthetica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cea2261b-5773-4917-a3ad-3a38776d5f67/harman_accentra_distribution_blower_noise.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3888321-85bc-4964-894c-8799da0d515d/before_the_flood_movie_discussion_worksheet_quizlet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9712a7f5-d991-4db9-b2c4-705cbc07ca69/fluke_t5-1000_electrical_tester_small.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/385bcc7a-9ac6-4a84-8fe2-f2e7c33b2602/older_model_used_cars_for_sale_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa5aa3ca-a14d-42df-a168-f521328fed8d/17572966903.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24c3ce5d-e34c-4d44-ab2b-e5dd731dbc04/roziredabikekun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a0f747b-402f-44ef-b820-be9ab758191c/the_price_of_admission.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42781764-711d-4c40-bb9e-20366f0d742e/nufibolokulari.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f40c337-4a5e-4958-b1fd-904ebf23fc8b/zozovo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0b67e31-cd3c-4789-b763-63a4510f6acf/idiots_guide_to_ayurveda_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06a475ad-874a-486e-9541-c46f74b07111/windows_server_2012_r2_datacenter_iso_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d29a1bc-a43c-4adc-8f07-7d6bd0e2b7f8/present_simple_and_present_continuous_worksheets_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bac211f8-df6a-45cc-8960-c62e84959d0d/soxurokozarijar.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_off0001312b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1312B 4764 bytes
SHA-256: 1bbd66b67299247900da7e81c40dc3bb9e9d4a4bd34a2af294e74f3261e75dc3
font_01_sfnt_off0001418e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1418E 12880 bytes
SHA-256: 0eab7dd7875d02bba0bf1be342ece0d734ae05af71b4b2f12320219463711ade