Malicious PDF — malware analysis report

Static analysis result for SHA-256 118b63ee31275d3a…

MALICIOUS

PDF

82.8 KB Created: 2021-03-27 11:21:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 659dd91b22e88a7d0b364e288a991e5a SHA-1: d3d998efea91881abb5fe4e865d58037807adaaa SHA-256: 118b63ee31275d3adf1d361aa5ceab6293ebe9a5039e79830cca62b59f4e9db7
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_UTM_REDIRECTOR_LINK' heuristics. The primary malicious URL identified is https://dafemum.ru/strik?utm_term=the+devil+wears+prada+movie+trailer, which is used in a phishing lure disguised as a movie trailer. The ML classifier and ClamAV detection further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=the+devil+wears+prada+movie+trailer In PDF document text
    • http://dunatizikasinab.22web.org/important_airlines_of_the_world.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389394/normal_5fe24f3708c0d.pdfIn PDF document text
    • http://oneitstore.info/xoragepanibo9fl4l.pdfIn PDF document text
    • http://kumaboperituf.22web.org/web_services_testing.pdfIn PDF document text
    • http://eu-study.ru/five_nights_at_mac_tonight09var.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447641/normal_5fe2988845b1b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412568/normal_5fec9ff83e30e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369329/normal_603631e3ca373.pdfIn PDF document text
    • http://mavito.online/nemidotijezolovm54di.pdfIn PDF document text
    • http://iciko.xyz/stars_coming_out_of_box_memegl999.pdfIn PDF document text
    • http://jidojagijubu.iblogger.org/witanerovudalewipera.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367922/normal_5fe8ad9266d05.pdfIn PDF document text
    • http://luranowebereni.22web.org/progressive_muscle_relaxation_worksheets.pdfIn PDF document text
    • http://francobusiness.com/microsoft_windows_server_2012_r2_foundation_iso_downloadtkf2n.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/nonabafat/can_you_make_smoothies_with_blender.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/77280782149.pdfIn PDF document text
    • http://rilijoxedu.rf.gd/turisufasaserazetif.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/fegefire.pdfIn PDF document text
    • http://wedagavuvux.epizy.com/84706792394.pdfIn PDF document text
    • http://midekudaxigol.rf.gd/43586807072.pdfIn PDF document text
    • https://s3.amazonaws.com/gimufesajo/road_to_kingdom_manga_wiki.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/84237828765.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/number_theory_burton.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/8643711700.pdfIn PDF document text
    • http://sudiwoke.epizy.com/android_adjustpan_hides_toolbar.pdfIn PDF document text
    • http://sejixopur.rf.gd/chasing_cars_easy_piano_sheet_music_free.pdfIn PDF document text
    • http://wawefib.rf.gd/android_studio_keyboard_shortcuts_ubuntu.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_off000103d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D5 5300 bytes
SHA-256: 977a98906b702d8bced460bdadb572b35447c2f4bf890882bbace2b0f26c3b13
font_01_sfnt_off000115c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115C5 11568 bytes
SHA-256: e52da88928aa5ab0f39eb1d42d2c585ed93f39e8755a976f0ce0afbd4966c196