Malicious PDF — malware analysis report

Static analysis result for SHA-256 24b62c82199233fe…

MALICIOUS

PDF

75.1 KB Created: 2021-03-16 04:24:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 07243a17a3701b59b3c7445ed519292b SHA-1: 184d6106507d7b26e1e1e39c194e4e4a1e285551 SHA-256: 24b62c82199233fed41ed128bd49c3330cb1d203c714fe1b08ba632737f346ea
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm. The presence of the URL 'https://leonvi.ru/wix?keyword=jacked+up+chevy+s10' and the heuristic 'PDF_SEO_LINK_FARM' strongly suggest a malicious intent to manipulate search engine results or redirect users to potentially harmful sites. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://leonvi.ru/wix?keyword=jacked+up+chevy+s10 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4475741/normal_6032a3770951a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404105/normal_604e315524dc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475379/normal_602409fdcd817.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457006/normal_6019730482cad.pdfIn PDF document text
    • http://lusaxesa.iblogger.org/lumepelewavinupi.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/40061ce5-0484-4ab2-b9eb-3862ff6dcccd/pusos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2be34a2-6282-45ca-a40a-319fce1a5aaa/the_heirs_ost_full_album_mp3_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07599469-4cc5-4cec-bb05-037d92e9b0f3/how_many_amps_should_a_compressor_draw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9e367ea-f1a5-4538-9346-de637cf1ea9f/what_is_fob_in_freight.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c464ac10-2bbd-40c7-9ce4-c1cd7acecf84/53277659044.pdfIn PDF document text
    • https://141ebdc9-a3c9-4c6d-b8f9-366dbf139dec.filesusr.com/ugd/46bfb0_8b9bda30c773463da0b77dd9540a5998.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ada01644-5e87-45ff-80c3-15f1f21907dd/ilive_sound_bar_codes.pdfIn PDF document text
    • http://peburameg.epizy.com/filmora9_template_free.pdfIn PDF document text
    • https://2f8a6ab9-e864-4757-b083-6627a13f4c48.filesusr.com/ugd/405339_31b6fa5c5dff40c387eef5c61682e04c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/all_chucky_movies.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/29092455208.pdfIn PDF document text
    • http://badetez.epizy.com/why_jelly_beans_are_bad_for_you.pdfIn PDF document text
    • http://rovuwuruw.epizy.com/cursive_m_and_n_worksheet.pdfIn PDF document text
    • https://b1e6e3cd-24a2-426a-8b7d-e8f4bd81915b.filesusr.com/ugd/83e584_88b49a11c4a247f080c9a2e4d838dc9c.pdf?index=trueIn PDF document text
    • https://3c4962d9-41f7-4f14-8396-dad57cc8de20.filesusr.com/ugd/a2de88_980dd3a10f7e4c34a82d737687bc79b9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gifiz/docket_sheet_lookup_pa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/131f3b3e-50ba-4caa-bf73-5e546b359753/dns-323_manual_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/org_chart_in_word_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59b21237-0f1b-4a35-936c-2dd96e491668/13184635571.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_off0000e7b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B1 5440 bytes
SHA-256: b7bb8331b262324ef2abfbf5721f995a62c57fcf2d171fed7bac2d78ae121d34
font_01_sfnt_off0000fa46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA46 10736 bytes
SHA-256: f03ec47489323a01dc2d5ac760b888ca51d8474c4bb4fb807e2b1c97fbeda044

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