Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d095416460c0b91…

MALICIOUS

PDF

67.6 KB Created: 2021-03-28 00:06:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 48407acbb287e439404106b9538c15a1 SHA-1: cff2871487ae64444e77b4e7fdfbae1874acaf43 SHA-256: 9d095416460c0b91cf1aff865f5cd50286877d044fc86b35645654fe68ba1991
136 Risk Score

Malware Insights

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

The PDF contains a lure for free wallpapers, which is a common phishing tactic. It redirects to an SEO redirector, indicating a phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • 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://seumenha.ru/123?utm_term=samsung+s10+plus+wallpaper+4k PDF link annotation
    • http://robugipunebib.mygamesonline.org/wixomefefakidozunuras.pdfIn PDF document text
    • http://fidofawi.medianewsonline.com/punon.pdfIn PDF document text
    • http://vozuzutiwajuzip.getenjoyment.net/9534921322.pdfIn PDF document text
    • http://gomijexa.mywebcommunity.org/salmos_himnos_y_canticos_espirituales.pdfIn PDF document text
    • http://movawizaxaxato.mywebcommunity.org/how_to_determine_allowable_bending_stress.pdfIn PDF document text
    • http://tavafotuzefox.sportsontheweb.net/xpert_bcr_abl_ultra.pdfIn PDF document text
    • http://bosemefawixuwov.mypressonline.com/79231857649.pdfIn PDF document text
    • http://mazisim.mywebcommunity.org/l_alienista_libro.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/tobojelusiwi/minecraft_free_download_full_version_windows_10_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/watusibiligovopo.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/week_1_fantasy_football_rankings_bleacher_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efedd2c8-6897-4033-a5fa-ce6ab620face/beginner_piano_music_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49cdfbf1-394a-4983-889f-7ea3b9f343dd/how_to_compress_jpeg_file_size_in_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff73bed9-a718-40a3-806d-fc9e23f3701b/giridojebatotefipig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c377e3f-8dc8-49d5-959b-23f61bc8e4a7/how_to_light_a_dearborn_heater.pdfIn PDF document text
    • http://dopovis.myartsonline.com/rilupof.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/82671968334.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6338fc20-4e59-419d-801a-c520eb7af240/titans_curse_synopsis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e206987-c6a1-4392-8bc1-9bb72b3fd547/jilawagufifixusexomogu.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/best_free_logo_design_software_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/ubah_ke_word_candy.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/jabariya_jodi_movie_480p_khatrimaza.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/62975222231.pdfIn PDF document text
    • http://jusopetikikij.onlinewebshop.net/gawaloresomuzo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3777b660-4583-4285-9715-4110a7976f73/befurolemumupu.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/27156964175.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_off0000cb84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB84 5680 bytes
SHA-256: 9e29a0e6b0f832c8ce869c3da153edfa8afaa015a956d43311e9f0e00194f5d3
font_01_sfnt_off0000dedc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEDC 10360 bytes
SHA-256: 4d1d9439cbd9baca52533a901ce8dd623ddf33817111dc20c7c7096b54b00ca4