Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d1d6b315106bd0a…

MALICIOUS

PDF

86.3 KB Created: 2021-04-12 14:41:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 2f14451dc1ae02c6ff2a1476fb91a1df SHA-1: 50429d5b4d4c22651fe204c2431d25c3d7697831 SHA-256: 0d1d6b315106bd0a00bb9d14f3a092e0774adcaedf5eb910ab85d6194266fe77
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9999

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
  • 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://seumenha.ru/strik?utm_term=mississippi+drivers+license+renewal+kiosk PDF link annotation
    • http://lafutib.sportsontheweb.net/arduino_language_reference.pdfIn PDF document text
    • http://zivemigidefis.mypressonline.com/baixar_free_to_word_doc_converter.pdfIn PDF document text
    • http://juwupexutaval.mywebcommunity.org/couper_en_ligne_gratuit.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460723/normal_5ffdfe550e8a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485152/normal_600d7aa5723b0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://40ba1f7a-6e91-49bb-bbb8-dfbb40a2bc60.filesusr.com/ugd/22bf55_f0cee36e36f04989aeb5d209d9666eb0.pdf?index=trueIn PDF document text
    • https://d5fb4b5d-766d-4e54-ab1c-ecc61d2b7d82.filesusr.com/ugd/b0c8dc_dbbc8e90508644de8fbff4939fbd2135.pdf?index=trueIn PDF document text
    • http://tososite.onlinewebshop.net/majizifexeg.pdfIn PDF document text
    • https://f171294f-ed7a-4884-a773-1e826a512430.filesusr.com/ugd/20d861_3e5daa073a924707bce95e8423df9c9c.pdf?index=trueIn PDF document text
    • https://9e2901ea-5d25-41a5-867c-54d0774c6e48.filesusr.com/ugd/4d0f37_b67e9b666c634d1c944908aa392ba325.pdf?index=trueIn PDF document text
    • https://997b2cc2-d96d-4654-b184-8a5d7ad473c0.filesusr.com/ugd/b8d08c_0d4792fedab54b02bc091e0318a0337a.pdf?index=trueIn PDF document text
    • http://rodexiguv.onlinewebshop.net/genetic_algorithm_by_goldberg_book.pdfIn PDF document text
    • https://1a2149e7-ca7f-4e7c-a584-0e483de6f3af.filesusr.com/ugd/9219f8_db8d5ca014e94b22b7aa7d49b6a326d4.pdf?index=trueIn PDF document text
    • https://a181bb3e-7445-4f1f-a1cf-b2fe66c13e92.filesusr.com/ugd/91ce54_a560c7cdf0d74bbf946544f2b573f764.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wujixus/happy_birthday_banner_template_publisher.pdfIn PDF document text
    • http://nudagimanefej.atwebpages.com/anouilh_mde.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/cahier_de_charge_fonctionnel_informatique.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_off0001101b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1101B 5288 bytes
SHA-256: f16370a462cf23ad3c2a6ec4bcc2fd4ed0c719e2ae80b42c32c99b7741ad3601
font_01_sfnt_off0001224a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1224A 11896 bytes
SHA-256: d21aa9e3644cf02b10fb63e665ceaf27f180e9c9dc289c91d4f5647daab0687b

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