Malicious PDF — malware analysis report

Static analysis result for SHA-256 97572e138a969fc9…

MALICIOUS

PDF

77.1 KB Created: 2021-03-28 16:49:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 05b9ebf1bb861c3842b1159a380fac4a SHA-1: b044fe760804dce91b8f390321a1699afda4ea96 SHA-256: 97572e138a969fc9102301973f1f675324aad858a6c3467cfb222693dcdbeee4
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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 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.
  • 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://druttle.ru/123?utm_term=geonosis+tb+guide PDF link annotation
    • https://cdn.sqhk.co/pirujezexod/chcVkig/vosovilen.pdfIn PDF document text
    • https://cdn.sqhk.co/rawatajizefu/ccYjhze/61854255990.pdfIn PDF document text
    • https://gemiporelowagi.weebly.com/uploads/1/3/0/7/130775846/8812972.pdfIn PDF document text
    • https://cdn.sqhk.co/lajojeletab/dthcHJN/13891518014.pdfIn PDF document text
    • https://datedevob.weebly.com/uploads/1/3/1/3/131381982/ee22d2360283d.pdfIn PDF document text
    • https://pabotori.weebly.com/uploads/1/3/1/0/131070723/bulubowega.pdfIn PDF document text
    • http://jomikifu.medianewsonline.com/gojevedopado.pdfIn PDF document text
    • https://fetevosave.weebly.com/uploads/1/3/1/4/131438058/7420648.pdfIn PDF document text
    • https://zejibafubetu.weebly.com/uploads/1/3/4/1/134108860/085e5a5e.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/65d51b66-5288-4363-97e0-0e2959e26722/11568568348.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/how_to_fix_your_hp_printer_when_it_does_not_turn_on.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06eb1cee-e22e-440d-a472-2ef8e320f994/sibuvolax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6ae3ef6-ab94-413e-a9ef-efc493fa894d/dilejudef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c623337-1eb3-4eab-9223-611d552ca56f/how_do_i_print_photos_on_my_hp_envy_4500.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/vs_code_format_on_save_python.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66ca0c8c-de2e-4e99-a2b8-115227363a99/la_familia_de_pascual_duarte_personajes_femeninos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edf7c593-cd47-4518-9f37-0f91a9484def/asp.net_mvc_4_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6ab5be3-5536-4d73-a2c9-b05b4602917c/buvaxogo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/436eae5d-62fe-4073-ad51-0d79f779bd12/58799246296.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff52bbcc-121e-4df3-bfdd-97b670226e18/7_spiritual_laws_of_yoga.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/best_replacement_battery_for_roomba_880.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/how_to_reset_arris_router_password.pdfIn PDF document text
    • http://fatavetotujel.onlinewebshop.net/kimigo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60497af4-b558-48dc-ad20-2db042a57d30/13676663970.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_off0000eabb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABB 4828 bytes
SHA-256: cbdda71033d0804b97744e34cd02b96270ca79c55703e9e4443e1ab67e19e6a0
font_01_sfnt_off0000fb3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3D 13172 bytes
SHA-256: d541b26457ebf56e268da98c313773c495733317da1d81ec0c959ff732d42fd3