Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec3a1dd8706b038f…

MALICIOUS

PDF

74.2 KB Created: 2021-03-21 22:47:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 695e643337f32fd240ec639cccc2e4e6 SHA-1: 15a63f190aa1374102b09eff07b8bda5c6c3e214 SHA-256: ec3a1dd8706b038fe1bec72d2ee31424af0fc9ca33f7e94c91a1b89211d2be91
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9994

Heuristics 5

  • 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 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://bologen.ru/123?utm_term=chaitrada+premanjali+kannada+movie PDF link annotation
    • http://amandeepsadyora.com/social_learning_theory_definition_criminology5g8m0.pdfIn PDF document text
    • http://onlinekartiadesi.com/31894256969k4ouo.pdfIn PDF document text
    • http://xbet1.fun/7856159325wo71u.pdfIn PDF document text
    • http://loxigedu.iblogger.org/piwaniduxosixizi.pdfIn PDF document text
    • http://kellys.space/heart_healthy_diet_nutrition_guidelinesohq70.pdfIn PDF document text
    • http://slimerecipe.org/is_ethene_polar_or_nonpolarm2dyh.pdfIn PDF document text
    • http://legrand-spb.ru/swim_with_the_sharks_without_being_eaten_alive_summary2wk3r.pdfIn PDF document text
    • https://wanevowak.weebly.com/uploads/1/3/4/4/134465130/1453742.pdfIn PDF document text
    • https://dawudetunik.weebly.com/uploads/1/3/5/9/135972975/51e983af9206d.pdfIn PDF document text
    • http://bovewitavivebu.getenjoyment.net/exercise_for_lower_back_pain_relief.pdfIn PDF document text
    • https://bakogala.weebly.com/uploads/1/3/1/3/131384254/lelifasuj.pdfIn PDF document text
    • http://yachtcharter.group/el_lazarillo_de_tormes_resumen_tratado_6vhyho.pdfIn PDF document text
    • http://zetopabuki.22web.org/34808315942.pdfIn PDF document text
    • http://bestpriceforukraine.xyz/94645621045zuouy.pdfIn PDF document text
    • http://com-signto5.xyz/angular_use_variable_in_template1phmb.pdfIn PDF document text
    • http://xinuvaro.sportsontheweb.net/sixowedofenabogabaxipar.pdfIn PDF document text
    • https://dudasajaje.weebly.com/uploads/1/3/4/3/134362454/3d1dba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://zigakakedulogim.myartsonline.com/sowigikizav.pdfIn PDF document text
    • http://dupepoge.onlinewebshop.net/tisawowatari.pdfIn PDF document text
    • http://saxarivoje.onlinewebshop.net/lirogerepedexedul.pdfIn PDF document text
    • http://vimonaker.epizy.com/catholic_charismatic_prayer_group_format.pdfIn PDF document text
    • http://gobonelore.epizy.com/braums_menu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d71a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD71A 5124 bytes
SHA-256: a7af6229ce43f35da5a45f45e0d150f4b4f0248762f8da4940421941989da63f
font_01_sfnt_off0000e85f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE85F 4184 bytes
SHA-256: f72464fb5662a8f498dbf1279c57f6c70e59518ecd45b40817f3f4c409bca0bf
font_02_sfnt_off0000f7ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7EA 10032 bytes
SHA-256: 8ec28556463e837f7803886492373001d70ee128e8612ca7669c1d01403d47d7