Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb06e3c43770b476…

MALICIOUS

PDF

86.1 KB Created: 2021-03-13 20:59:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 3700e2b5b54489afe2328267f79396ce SHA-1: 3cac4d14c3a8ad33da9a21c0d7aceb167bfb0c0c SHA-256: fb06e3c43770b476f4f713dbd1ff6ea9d27d8ba015b353badc3dcc51e1992ba3
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable hosting, and a high concentration of links on a single domain, indicating a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The presence of 'utm_term' in the primary URL suggests tracking for a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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://soxebez.ru/123?utm_term=axe+alliance+x+empire+apk+descargar PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4480732/normal_6042fa62161e8.pdfIn PDF document text
    • https://cdn.sqhk.co/jomonufo/dL6hegf/botavinemogoz.pdfIn PDF document text
    • https://cdn.sqhk.co/revipidamog/idbgfhb/15283668633.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417535/normal_5fd64c515659d.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxubefe/hejiBgj/x_doria_defense_apple_watch_case.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376098/normal_600895a681796.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465007/normal_5fd28a95979a0.pdfIn PDF document text
    • http://zonizubiro.getenjoyment.net/16139915395.pdfIn PDF document text
    • https://cdn.sqhk.co/rosisole/hdk3ena/rizutasefomenose.pdfIn PDF document text
    • http://manidat.sportsontheweb.net/wofefiliginimusu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407813/normal_604d0774019c7.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/e8c21248-732f-485c-8e4b-9851da709aae/the_god_who_is_there.pdfIn PDF document text
    • http://jimomurapujivo.onlinewebshop.net/wordly_wise_book_8_lesson_12_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6e4e711-2dc0-4a21-947e-a23cdd1b4b29/37004680394.pdfIn PDF document text
    • http://zejibanunepi.myartsonline.com/26977708039.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45ac30b4-10bc-4a94-b469-11e2578b69dd/catching_fire_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9a4ee1a-8a35-4d1d-a709-d6e280796c31/dogoburujubad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0929a63-1b86-41d6-a949-fbbed56993bb/what_is_the_salary_of_digital_marketing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9c335b4-bbdf-4dba-9157-176b81c15d3e/kexakasirijavugino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/398c5c0e-de8a-416d-b9cf-eeff56ff3a98/9014462588.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dff85b7-7020-478c-8b4a-2074b49b6ede/are_there_any_recalls_on_2013_jeep_grand_cherokee.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/060d43f0-0919-4c72-9f1f-54be215fe817/can_you_attach_a_car_seat_to_a_bob_stroller.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_off0000e804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE804 5512 bytes
SHA-256: 10b7cc254538d3dfb941ac5b1fa84271124fab379b9524779ceab931940ce03d
font_01_sfnt_off0000faad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAD 26868 bytes
SHA-256: 8ea6ef852e4ef1c27a841f00580ee6f951139ad46587b77db4f9de68cecb881b
font_02_sfnt_off00013317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13317 16332 bytes
SHA-256: 778f6f623765cf3de1ea3c2e8572f54260faf6bdd2ee9cbf1ff3870de0943f92