Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ab463d8262c4e6f…

MALICIOUS

PDF

94.6 KB Created: 2021-02-27 19:06:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 1483603b29ad5691133580409bff1163 SHA-1: 204dbdf442e8588e7985c563e15e9ca4009c6bdc SHA-256: 5ab463d8262c4e6fb4c4d592195846e2694ffc20524e616748826a0ca0f155ac
136 Risk Score

Malware Insights

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

The file is a PDF identified as malicious by ClamAV and an ML classifier. It contains an embedded URI and a high-severity heuristic indicating it's an image lure linking to an SEO redirector for phishing. The document body, though heavily obfuscated, appears to relate to 'safety glasses', suggesting a pretext for the phishing attempt. No scripts were extracted, but the presence of a malicious PDF with a redirector URL strongly suggests an attempt to deliver a payload or phish credentials.

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
  • 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://nipisod.ru/123?utm_term=best+anti+fog+safety+glasses+for+construction PDF link annotation
    • http://olipaka.xyz/61592223980e4zn6.pdfIn PDF document text
    • http://mazoxobiziwikut.iblogger.org/javascript_cheat_sheet_stanford.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450632/normal_5fd16e3ba1ea5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381108/normal_5ff852e9a2a11.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366045/normal_5fc9cde9bfdbc.pdfIn PDF document text
    • http://gedatidigog.sportsontheweb.net/famine_affluence_and_morality_sparknotes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378170/normal_600a81cd69eb7.pdfIn PDF document text
    • http://ourfutures.space/download_subway_princess_runner_java_gamenup36.pdfIn PDF document text
    • http://kinoxca.xyz/nevegadotuxikazepuvkrb37.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kititone.epizy.com/36191355182.pdfIn PDF document text
    • http://komadolosa.rf.gd/tekinesidijaxosasa.pdfIn PDF document text
    • http://futakanawus.onlinewebshop.net/how_much_does_a_tiny_plastic_bag_weigh.pdfIn PDF document text
    • http://mezomiwewelebe.epizy.com/vomufifijik.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/flight_tracking_app_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/tja1040t_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/2327309348.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/tv_show_s_sites.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/kenopowarutoroxule.pdfIn PDF document text
    • http://vexolofifete.atwebpages.com/1-1_skills_practice_variables_and_expressions_answer_key_algebra_2.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/45994454196.pdfIn PDF document text
    • http://wotidupodugi.myartsonline.com/coleman_powermate_pro_gen_5000_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/vorowamafegiberuzik.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_off00013512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13512 5200 bytes
SHA-256: 2796d357554ad18dfad72e00e2152ce6ea1d8015c89bc603f2fb20eba8f77e6c
font_01_sfnt_off000146e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146E7 11164 bytes
SHA-256: e3e97608b76f3df73a1324fe6e29584d14e2b5b75df9271a7c4b871258d72da2