Malicious PDF — malware analysis report

Static analysis result for SHA-256 96c99d935fc06c16…

MALICIOUS

PDF

77.0 KB Created: 2021-03-06 23:53:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: fc2320df808f4a882a203694b225049a SHA-1: 789b53bb576f214a1f291dfa4c3451ebfce1e1a0 SHA-256: 96c99d935fc06c165b389dde259ba95965696269537282b1e7ec2773bfc9cc8e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically pointing to a suspicious domain ('soxebez.ru') that is likely part of a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed as a link farm on disposable hosting, further supporting a malicious intent. No scripts were extracted, but the presence of external URIs and the link farm nature strongly suggest the document's purpose is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/award?keyword=les+miserables+2012+finale+%2528last+song%2529+lyrics PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4477623/normal_60397992dc688.pdfIn PDF document text
    • http://vannabanyavsedela.xyz/dozudusik719hl.pdfIn PDF document text
    • http://nemugub.mywebcommunity.org/nikon_coolpix_p610_price_in_bangladesh.pdfIn PDF document text
    • http://idealicaitalia-ufficiale.site/xikupivosexeluwizerls8r5.pdfIn PDF document text
    • http://jolidulikan.scienceontheweb.net/pipofawuvi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383149/normal_603c55cf63f66.pdfIn PDF document text
    • http://latencfsrt.space/wunofekono1rebp.pdfIn PDF document text
    • http://filozajerezabi.getenjoyment.net/what_does_netbios_over_tcp_ip_mean.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502721/normal_5fe768fa37a3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488572/normal_6030838e4635e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412568/normal_5fefceafc3af5.pdfIn PDF document text
    • http://tamakar.xyz/in_ice_cold_blood_episode_guidet0ime.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/e1e4b69e-b07a-45df-9ecd-cd38c88b287f/studs_terkel_the_good_war_review.pdfIn PDF document text
    • http://timojodabemisux.myartsonline.com/hp_laserjet_p3015_toner_55x.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73b93610-4784-425d-8802-cc07786ca5f0/pafufe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e845907a-567a-4099-8eeb-14551661078e/korivanabipewe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2bee0b9-0b9c-42fc-bafd-734e8285b444/marie_lu_legend_characters.pdfIn PDF document text
    • http://jujageritoxo.atwebpages.com/kowogifovatuxomoze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62d60718-8c06-4df1-b1fd-add8750c0d2f/inkscape_tutorials_for_beginners_vector.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6f1c6e5-696a-44bc-8cc7-b4aac597791f/is_silence_of_lambs_on_netflix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b64927d-8d5e-4864-af7e-593c4e07cfac/is_the_white_princess_the_daughter_of_the_white_queen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2469ae05-a442-44be-9d1a-dba6aa2bbe14/jotiwiloxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b5bc340-3861-4af7-916e-3b39af440262/positive_behaviour_support_plan_template_ndis.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_off0000ee9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9C 5864 bytes
SHA-256: 43adb16ee15403d66cdc0d9f0d8b59d235a9eec9728cd682fdebaf0fbe3984c7
font_01_sfnt_off000102a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A3 10428 bytes
SHA-256: 3b49bc5bf67ed134ed074081d4535439d16ab33245504a477edeea63b0cd1cb4