Malicious PDF — malware analysis report

Static analysis result for SHA-256 4386095897b25afd…

MALICIOUS

PDF

96.5 KB Created: 2021-04-04 06:16:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b7dddddab38c2f78351b636dcaa62f89 SHA-1: bd4acea81548aeb9620743de4f1046051264554e SHA-256: 4386095897b25afdf22e49d3e168dae08977ae82c4d4170d4502040f12f2c8cd
166 Risk Score

Malware Insights

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

The PDF contains multiple suspicious links, including an invisible link to 'lnstagram-support.live', indicating a phishing or malware lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a common phishing or downloader pattern.

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://seumenha.ru/strik?utm_term=troy+bilt+mustang+50+inch+zero+turn+deck+belt PDF link annotation
    • https://runolenasugu.weebly.com/uploads/1/3/4/7/134765044/0b90f4e4b40a8f7.pdfIn PDF document text
    • https://lerasakob.weebly.com/uploads/1/3/2/6/132682990/wedufibowux-buwolen-nomarawewemov.pdfIn PDF document text
    • https://xisiwifuroki.weebly.com/uploads/1/3/5/3/135323104/xuganato-bofikepegof-japetixurew.pdfIn PDF document text
    • http://fomoregekamikat.mypressonline.com/agility_definition.pdfIn PDF document text
    • http://summ-ita.space/bella_and_the_bulldogs_cuckoldd1twi.pdfIn PDF document text
    • http://lnstagram-support.live/tugixaperemupalupitokwei9z.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7404da97-7fcf-4d5f-9d5f-3f8644e6773a.filesusr.com/ugd/35f767_d24df77daa864ec198673ed23b653d26.pdf?index=trueIn PDF document text
    • http://sefokirof.onlinewebshop.net/quantitative_risk_management_concepts_techniques_and_tools_revised_edition.pdfIn PDF document text
    • https://2daccc73-8708-4113-a26a-4f38906335d9.filesusr.com/ugd/f65175_18a6c46c337545d1b2a52597520286c1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb3274f6-aaf0-4c6c-89d4-f3f9d799de77/how_long_does_it_take_to_get_stamps_online_from_usps.pdfIn PDF document text
    • https://dc010c70-835d-4b56-8cb0-1e1bda7cab64.filesusr.com/ugd/fb576b_f4a881a3736242f39d6d34b217b6961e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sezewu/e_adhaar_by_name.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9653e1d-3c37-4579-885d-c9d8f2422ebd/chilton_auto_repair_manuals_toyota.pdfIn PDF document text
    • http://gipebevu.atwebpages.com/how_to_get_the_average_atomic_mass_of_an_element.pdfIn PDF document text
    • https://314f4944-3dd9-45af-b5ee-fc7f46c963e4.filesusr.com/ugd/73cb9e_524a4116821e44949886ccbe7591a55f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/76d53806-ad04-4bb9-8e72-1f5a3879e591/kinabes.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/daserenemuzevofewexobud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a4737d0-c88b-4414-bd29-b5714515dc6e/75563528014.pdfIn PDF document text
    • https://01c19f78-c7d0-441a-b56a-8672493f87de.filesusr.com/ugd/9d66c7_fc8f886ae3534b47a7c5aa7b9cbffa7b.pdf?index=trueIn PDF document text
    • http://sazebufaz.atwebpages.com/72064011776.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31566d07-bcf5-4853-a516-d1a5c4df0ea2/duferubekagusuxupibunen.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_off00013870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13870 5924 bytes
SHA-256: fc59758b001a5aee10b96dabcfd08598e74728fd2216f4618e003e292db7b5fe
font_01_sfnt_off00014c81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C81 12056 bytes
SHA-256: dd12eb9ff91612532f2beb609ba2b1b6077df63b982ed22550a2d15af7fce7c7