Malicious PDF — malware analysis report

Static analysis result for SHA-256 06470ff4ff6f5a13…

MALICIOUS

PDF

87.5 KB Created: 2021-03-30 03:46:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 84c40f681db7d950119ad869fe5cd1e8 SHA-1: 9d3de718cdd699865488b6d68c44cffc14c23737 SHA-256: 06470ff4ff6f5a13bb63db0ac8767e5e5e3fd1738016f88fc1a6f93d32e2727c
146 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is malformed and contains external URIs, suggesting it is designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs point to domains that are likely part of a phishing or malware distribution scheme, aiming to trick users into downloading further malicious content or visiting fraudulent sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://fokemale.ru/award?keyword=objectives+of+bretton+woods+system+pdf PDF link annotation
    • http://fodamibokaf.66ghz.com/sepsis_pathophysiology.pdfIn PDF document text
    • http://nakodinita.scienceontheweb.net/buzilijebuledoseturedixe.pdfIn PDF document text
    • http://clientbluebadge.com/what_is_mis_manager_job_descriptiond1geo.pdfIn PDF document text
    • http://idealicaitaly.site/how_do_i_change_pressure_in_my_cpapxkq50.pdfIn PDF document text
    • http://gazozasi.scienceontheweb.net/86530862393.pdfIn PDF document text
    • http://nubolutlion.xyz/mifogoz8ciu.pdfIn PDF document text
    • http://vipmanmarket.space/chronic_liver_disease_guidelineszh9jc.pdfIn PDF document text
    • http://akfb.online/tekken_7_iso_ppsspp_android_downloadu426z.pdfIn PDF document text
    • http://nekuwagibajese.getenjoyment.net/geramopafibozatonivevifef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4adff18d-dc39-4349-be2c-eeb12737f1cb.filesusr.com/ugd/9117e0_f4b8938003bf4a7ab84a7dc7a199d76f.pdf?index=trueIn PDF document text
    • http://lipetefafozil.epizy.com/derechos_humanos_ejemplos_para_nios.pdfIn PDF document text
    • https://e691ad07-92dc-45fa-af10-8929b4045ede.filesusr.com/ugd/87b9a8_a67a1973e40e458ba008212931692429.pdf?index=trueIn PDF document text
    • https://2080fafa-2491-4ac3-8118-a138f33bff34.filesusr.com/ugd/822ecd_98022c144a8b49cd9fd911bcac98669c.pdf?index=trueIn PDF document text
    • http://nizofikunatafu.atwebpages.com/brandt_daroff_exercises.pdfIn PDF document text
    • https://3857ddc0-2b33-46ba-b4a8-ebef9b167687.filesusr.com/ugd/5cc0d5_fd2fa51394a84f8887b81897fe81ecd7.pdf?index=trueIn PDF document text
    • https://ad177677-9664-42cd-9bf2-17a10eef6e1d.filesusr.com/ugd/f8915e_94d74aeed00b458ca6b0ccc110b586c7.pdf?index=trueIn PDF document text
    • http://dasamixatile.epizy.com/biological_science_reviewer_for_let_exam.pdfIn PDF document text
    • http://famekuputoda.myartsonline.com/aprendizagem_motora_conceitos_e_aplicaes_download.pdfIn PDF document text
    • http://zakefuki.myartsonline.com/class_9_maths_construction.pdfIn PDF document text
    • http://zogadawedalifap.onlinewebshop.net/17043680206.pdfIn PDF document text
    • https://198d5876-2e36-4a54-a59d-b4c1060b65be.filesusr.com/ugd/4733ca_5cea35167a1a4416bc1437237f502d7b.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_off00011686.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11686 5556 bytes
SHA-256: e09738cb53b2d432178bfd1aaf56de052f262aef7e25274c4907fa64d78b437e
font_01_sfnt_off00012974.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12974 10976 bytes
SHA-256: b0ca89f7b422c56bb5ccdb9c60ae96ee151a316cbd4ed669f2a7c047dd38fa35