Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f0732366cecd826…

MALICIOUS

PDF

68.6 KB Created: 2021-04-22 16:17:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 58782ce038b51345a22cd3cf475fea7e SHA-1: e920fc0282b1ff6a183e617f3c39bc82aecb94e6 SHA-256: 9f0732366cecd8261c1636c0ef1c35e27256caa3cb13c35e4ef4df2efeeb9050
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a prominent one disguised as a search result for 'Briggs and Stratton service center near me'. Heuristics indicate this is a link farm on disposable hosting, and ML classifiers and ClamAV strongly flag it as malicious, likely a phishing or malware distribution attempt. No scripts were extracted, but the sheer volume of suspicious URLs suggests a coordinated effort to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://ponafet.ru/strik?utm_term=briggs+and+stratton+service+center+near+me PDF link annotation
    • http://rozewevojalel.sportsontheweb.net/lic_jeevan_saral_policy_details_plan.pdfIn PDF document text
    • https://durabaseduxoj.weebly.com/uploads/1/3/4/2/134235759/3b9e58426bd.pdfIn PDF document text
    • https://cdn.sqhk.co/wuwosexed/0jdBZfp/bein_sports_tv_guide_rugby.pdfIn PDF document text
    • https://cdn.sqhk.co/polidupokasu/jhhi1Wp/zombieland_2009_kill_count.pdfIn PDF document text
    • https://zadivodewereb.weebly.com/uploads/1/3/2/6/132683121/9635093.pdfIn PDF document text
    • https://cdn.sqhk.co/baxorurifina/eLK8qK4/91200511863.pdfIn PDF document text
    • http://mokenolovulonom.medianewsonline.com/formato_de_contrato_de_confidencialidad_para_empleados.pdfIn PDF document text
    • https://cdn.sqhk.co/rixakowu/egiSihL/binidituditireparikogun.pdfIn PDF document text
    • https://kajugomurabamuj.weebly.com/uploads/1/3/0/8/130814292/7486c02135d286.pdfIn PDF document text
    • http://ravasixojodari.mygamesonline.org/fuvokiveliwumoxeruwumape.pdfIn PDF document text
    • https://rizigavitud.weebly.com/uploads/1/3/4/5/134581125/1327943.pdfIn PDF document text
    • https://peromukagitogim.weebly.com/uploads/1/3/1/3/131383820/givozanifu_budoju_nifad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://satovimowenijor.myartsonline.com/minerals_in_thin_section_dexter_perkins.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18f8ea71-9fb0-43b8-b7c8-35714ba335a1/how_to_put_a_hard_page_break_in_word.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/malubipolanezuperufukezan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38e75549-f088-497a-bbf9-19c57986d814/83014709489.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/bheema_mp4_hd_video_songs.pdfIn PDF document text
    • https://feedbc21-cb93-402c-9ae2-3476589645d2.filesusr.com/ugd/f3ecbe_23ea398c40e74a61ab67d45ddf791f96.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/976786b8-635c-4a52-bf7d-8795c25e5a47/merit_badge_classes_online.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/35861210700.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e4e3bc4-f66e-493d-8a68-9b938face3f5/how_to_clean_spectra_s2_tubing.pdfIn PDF document text
    • https://ed0f7819-48b4-4c0d-9119-93de03d81b9c.filesusr.com/ugd/e481ce_e62a3dff73e9498ca72c675086d4811d.pdf?index=trueIn PDF document text
    • http://zowofiz.myartsonline.com/neoclasicismo_literatura_autores_y_obras.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/artscroll_siddur_online.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/93737954630.pdfIn PDF document text
    • https://c0e8410b-c394-4b36-8083-179878a46647.filesusr.com/ugd/d4b1dc_93ccc1fcb40e48eab2d6e79c55ab3134.pdf?index=trueIn 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_off0000cfd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFD9 5336 bytes
SHA-256: ab3813b49ca5792ca3ae24e5fa3a35a4ce699c9ef97246993042fd5c56d4f220
font_01_sfnt_off0000e1f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F7 10088 bytes
SHA-256: 111daedf42eb45f20532726702078839e65fe4d09572a46fb4b7b57520b22408