Malicious PDF — malware analysis report

Static analysis result for SHA-256 286bca5bf0112aed…

MALICIOUS

PDF

73.5 KB Created: 2021-03-06 05:42:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 635ab2511b1b045e36f59fd937bd261d SHA-1: 8abeb83288c20d63f38facdb276f7d0a945c8a3f SHA-256: 286bca5bf0112aedff75e403589efe7ab916988c10ad379732babcb85d7333b8
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier with high confidence. It contains a large number of external links, many of which are disguised as book downloads, pointing to potentially malicious domains. The document body, though heavily obfuscated, suggests a lure related to a movie trailer, likely to entice users to click on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://dugedepap.ru/strik?utm_term=the+secrets+we+keep+trailer+legendado PDF link annotation
    • http://gosoxegekiri.mywebcommunity.org/bergeys_manual_of_determinative_bacteriology_latest_edition.pdfIn PDF document text
    • http://polikarmonolit.ru/where_are_the_new_covid_cases_in_texas9ueuv.pdfIn PDF document text
    • http://komaxinatobofe.medianewsonline.com/getiwuxulisepopes.pdfIn PDF document text
    • http://ledy66.net/15407034535tt2ae.pdfIn PDF document text
    • http://sebevifa.getenjoyment.net/3916952654.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415321/normal_601112687320b.pdfIn PDF document text
    • http://minesaxofunawi.getenjoyment.net/how_to_draw_hair_easy_step_by_step_for_beginners.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380413/normal_602195f8ab455.pdfIn PDF document text
    • http://nomudepalak.medianewsonline.com/piperepabi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c5e26362-acc3-4c40-9db4-ce0cbd355080.filesusr.com/ugd/681527_347ef30ba1584f8181423f8fe2ce2495.pdf?index=trueIn PDF document text
    • https://77bc4ea4-de20-41c0-a463-a5315db628d9.filesusr.com/ugd/2c69e3_5aaf6d226d4d487bb576135571f5151a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/setugorejoxetivav.pdfIn PDF document text
    • http://newemepakirid.myartsonline.com/what_are_you_searching_for_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/ssoid_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/central_dogma_of_molecular_biology.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/doloribeto.pdfIn PDF document text
    • http://lobopekogolo.onlinewebshop.net/livomazaridavuwesa.pdfIn PDF document text
    • http://wikukodukoja.onlinewebshop.net/do_blue_dye_tests_always_have_a_faint_line.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/mavokazularad.pdfIn PDF document text
    • https://144c9d4d-401b-437b-b89f-6a5816d7da47.filesusr.com/ugd/cd33f5_e2b7c77892344c23a50d7b97c3e6fed0.pdf?index=trueIn 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_off0000e3a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A3 5440 bytes
SHA-256: 2800291e9a53b39acd47894c0866c057b1f4db106ca9360930e23bc88bc9838f
font_01_sfnt_off0000f633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF633 10192 bytes
SHA-256: b65e66899b2abb70fe6bda23f689646d54ddc9b471ef6a67056b23b4e5aa90f4

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