Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e9ba6962599c314…

MALICIOUS

PDF

91.4 KB Created: 2021-03-20 15:29:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d16f8fb22a576a6b670ed18904063453 SHA-1: cc1155647c40e6076a2cbf31d620cc61e0e57a06 SHA-256: 4e9ba6962599c314337e52a252ce55b21fa8db03ce48c3cf986136d80f40f97f
144 Risk Score

Malware Insights

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

The PDF contains a high-confidence heuristic firing for a redirector link, specifically identified as an 'Image lure linking to an SEO redirector (free-download phishing)'. The primary URL, https://vilenefex.ru/strik?utm_term=steel+magnolias+play+script+act+2, is suspicious and likely leads to a malicious download. ClamAV also detected this file as Pdf.Phishing.Trojan. The presence of embedded URLs and the ML classifier's high confidence score further support a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://vilenefex.ru/strik?utm_term=steel+magnolias+play+script+act+2 PDF link annotation
    • http://electorat.org/4950536498cgnc1.pdfIn PDF document text
    • http://xepivutede.22web.org/gapawilo.pdfIn PDF document text
    • https://cdn.sqhk.co/vixuwegijelo/ghjfgda/64577012130.pdfIn PDF document text
    • https://cdn.sqhk.co/viwiratoposu/ULjiQgj/blockchain_wallet_login_forgot_password.pdfIn PDF document text
    • https://cdn.sqhk.co/pasededi/gTtYcgO/66942035280.pdfIn PDF document text
    • http://copyrighthelpcentral.com/star_fighter_3001_free_downloadmn2sa.pdfIn PDF document text
    • http://istlan.space/63407655652sgpgg.pdfIn PDF document text
    • https://cdn.sqhk.co/mizipudi/giJemWt/flight_release_dates_for_december_2020.pdfIn PDF document text
    • http://brosbass.com/best_android_iptv_apk_2020kk7xd.pdfIn PDF document text
    • https://cdn.sqhk.co/doxufojixene/8oWeihf/check_my_bill_online.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/mejados/beatbox_music_player_pro_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/70439784017.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/miss_world_2014_question_and_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/safolebirenegilinemin.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/rogefulofoz.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/11699690539.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/balloon_crush_game_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/acknowledgement_for_a_narrative_report.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/fejegokevobetuz.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/zowisiwidot.pdfIn PDF document text
    • http://kotorewijog.epizy.com/angry_birds_go_hack_apk_2014.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/king_lear_themes_litcharts.pdfIn PDF document text
    • http://jetubomubiko.epizy.com/boyle_functional_training_for_sports.pdfIn PDF document text
    • http://xawoforusur.epizy.com/night_sky_with_stars_images_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11865 5380 bytes
SHA-256: b6aba1b5b5d3bef7e839ff650a54cc371c7a4f403921b503bf55ef9a28e59279
font_01_sfnt_off00012a93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A93 12300 bytes
SHA-256: 7a760e698df2de77c1495be684fd52d801eab7db06674526dba686418001aea0
font_02_sfnt_off00015221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15221 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71