Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeec7081d4978bdc…

MALICIOUS

PDF

74.6 KB Created: 2021-02-09 16:51:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 508b07450173ddc94b77ff59dde93d35 SHA-1: 81c204fd1f653abd10db5ebc2625275cfcb14f2a SHA-256: eeec7081d4978bdc3bf8cec991fce3c5f72551b0feab5b2b4a16b0ae8442cb50
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://jacksth.ru/wb?keyword=badmash%20number%201%20movies%20ing%20full%20hd PDF link annotation
    • https://dujolisinapujis.weebly.com/uploads/1/3/4/3/134328324/fufikexomediwefavo.pdfIn PDF document text
    • https://suwesinorilofev.weebly.com/uploads/1/3/4/0/134096988/nilonawube.pdfIn PDF document text
    • https://cdn.sqhk.co/vozevadijut/agjOxhi/ai_python_projects_for_beginners.pdfIn PDF document text
    • https://sujoxiwu.weebly.com/uploads/1/3/4/8/134879933/todibokozid_xazodidepavag_fegisowanegi.pdfIn PDF document text
    • http://glawerry.online/naxuxakadazamor6xpt8.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/sesijesule/arithmetic_mathematics_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/9239826962.pdfIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/panasonic_cordless_phones_with_answering_machine_costco.pdfIn PDF document text
    • http://fewigixof.rf.gd/coreldraw_software_for_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/conservation_of_energy_lab_challenge_popper_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/kusuxiresevawemodivatabov.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/76522224146.pdfIn PDF document text
    • http://nexaware.epizy.com/fupulaza.pdfIn PDF document text
    • https://s3.amazonaws.com/sezewu/boss_me_25_patches.pdfIn PDF document text
    • http://dejarovagozude.epizy.com/coplanar_waveguide_pcb_layout.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_off0000e5ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5EC 5624 bytes
SHA-256: 5a2de5ade71465ad0e1b5783b770a7dbecd49bb033020317a9a395924a43b0f3
font_01_sfnt_off0000f8f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F4 10660 bytes
SHA-256: 8f0ec54e228a953f124a645eebde2a8f9b18b6629366891bb2f8a0ece54df7ab