Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9113e277b30d12a…

MALICIOUS

PDF

79.3 KB Created: 2021-04-06 23:55:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: e0ad4e38823dd508832fc5b8ff4ae03f SHA-1: 7cf0c794a09e8c2167297d1dc17e291b01143e30 SHA-256: e9113e277b30d12a06f4e19a4c8e42adccb71fe2632ba07f9dd40bf2b49c49f4
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, contains text related to negotiating car lease deals, serving as a lure to direct users to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://vilenefex.ru/strik?utm_term=can+you+negotiate+car+lease+deals PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4478408/normal_60215eafa851c.pdfIn PDF document text
    • https://wozavosasegug.weebly.com/uploads/1/3/4/5/134509229/2241085.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382617/normal_602379dff034e.pdfIn PDF document text
    • http://ravajigivipa.22web.org/xomurekinivixebipomiwixen.pdfIn PDF document text
    • https://pixebekisutajud.weebly.com/uploads/1/3/0/7/130775176/ravibawinoje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370288/normal_60567e51dd45e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462986/normal_6000a63957a21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419193/normal_6042f99270aa4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://widepidaba.atwebpages.com/vagetewafu.pdfIn PDF document text
    • http://kulisiwodomewa.epizy.com/veniroredamaduradi.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/visaxumozeje.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/imdb_gifted_parents_guide.pdfIn PDF document text
    • http://sasejas.epizy.com/61455800928.pdfIn PDF document text
    • https://0c17d2ad-06a2-4efd-9128-26148cac6670.filesusr.com/ugd/44320b_074d875aa0014090afc640b46cbe86bf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wutogugej/accident_report_dmv_nj.pdfIn PDF document text
    • https://95a57b4d-a24c-4412-bd87-88f4f885d252.filesusr.com/ugd/011e4b_32146190f6da4c1daf3e25f31c93bcf5.pdf?index=trueIn PDF document text
    • https://9e9203d9-9f5b-42f2-a849-05e42d741f90.filesusr.com/ugd/3527d5_0d3c87ced6504187b7bc4e7037e00b8d.pdf?index=trueIn PDF document text
    • https://ae0ecf71-49bb-4ac4-bba4-d0f2a20d1af9.filesusr.com/ugd/668a47_cad865a0425f4f0aaf1de21b34ae4e00.pdf?index=trueIn PDF document text
    • http://xakagigoneliv.myartsonline.com/43922004494.pdfIn PDF document text
    • https://165b0ab0-89c3-4517-b88f-e2bd0c55d975.filesusr.com/ugd/97b555_4f54fe5f43e645b6a66bd8ca341a44f2.pdf?index=trueIn PDF document text
    • http://xonizud.epizy.com/what_is_the_strongest_type_of_intermolecular_force_between_solute_and_solvent_in_cus_in_ags.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/what_is_the_present_tense_of_the_verb_listen.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_off0000f909.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF909 5112 bytes
SHA-256: 6360f8ad4a1eae8b4da2c24a1c40bc7c3d5a57dd1d257277639078ea8bb50967
font_01_sfnt_off00010a80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A80 11012 bytes
SHA-256: 352fea999f55237d1f368455f63669a684227535c5663a07920e408c07ae8e9f

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