Malicious PDF — malware analysis report

Static analysis result for SHA-256 778c0ba84dea41d0…

MALICIOUS

PDF

75.1 KB Created: 2021-02-16 08:42:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 9bb100815c23a204ed74bced81a981d3 SHA-1: ecd8283157f65fbc9c7c4641d69f5d8581fb3dbf SHA-256: 778c0ba84dea41d0ac8cdf4b927974773f199552142766b865ceadb76e18b07e
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that masquerades as a search result for popular quotes, likely to trick users into visiting a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan PDF. No scripts were extracted, but the presence of an external URI points to a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/wb?keyword=best%20yoda%20quotes%20the%20last%20jedi PDF link annotation
    • https://cdn.sqhk.co/gunuzuli/3hb6Mij/movie_collections_on_netflix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477638/normal_6009d232a03ba.pdfIn PDF document text
    • https://cdn.sqhk.co/vugujebeku/baBjbXt/lovecraft_s_untold_stories_switch_review.pdfIn PDF document text
    • https://cdn.sqhk.co/fejisedetu/dgciahe/gozomurolaguwududumaje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502563/normal_5fd333b59fefe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368486/normal_5fe7940ad9871.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450634/normal_6005cc32ba603.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417526/normal_5ff66156aba5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369915/normal_600d951872c3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460983/normal_6017b91d41af9.pdfIn PDF document text
    • https://cdn.sqhk.co/kitujesijak/qjjihhd/introduction_to_business_management_8th_edition_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/niporofez/29934977620.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/mulugobowukotabe.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/weather_report_havelock_nc.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/biblical_meaning_of_names.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/hiring_poster_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/43911697844.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/4126465680.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/spreadsheet_for_sole_trader.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD489 5172 bytes
SHA-256: 9dfa589d29c8a19365c689acf7115a8aebbc7d875f9c1dc9e3e9ea1584b3c7b8
font_01_sfnt_off0000e62c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE62C 10328 bytes
SHA-256: 8e81bf8351144ba137f2da7bcc592cf44a03690a6d3c09f6535b03bbe7713b2b
font_02_sfnt_off00010995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10995 16192 bytes
SHA-256: 1ff76b967cdf3bc4238cb8097aa9d4755c8fb5bd66c4cf01391f6e70ad1e9315

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