Malicious PDF — malware analysis report

Static analysis result for SHA-256 90fb7baee1d0af70…

MALICIOUS

PDF

71.7 KB Created: 2021-02-16 01:44:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 3a3024f32f4718c9f8dcfe7c61967ffe SHA-1: 1349bbc1d365a1310c59ca23713273ab373d10c1 SHA-256: 90fb7baee1d0af700b6bd8de7a239ff34901b0a7fb3c26bdb259ca9bf71779ed
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/wix?keyword=alcances+y+limitaciones+de+un+proyecto PDF link annotation
    • https://cdn.sqhk.co/daxutoxod/e2icict/free_music_player_app_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/gadujotev/gjKIhig/download_game_arma_mobile_ops_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/mujowofapubi/D5icQii/16940299841.pdfIn PDF document text
    • http://xopodezilodule.iblogger.org/runescape_aminishi_temple_guide.pdfIn PDF document text
    • http://labincom-med.ru/219620047530ktvo.pdfIn PDF document text
    • https://biziremidawa.weebly.com/uploads/1/3/5/3/135397591/531744497ee15.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477910/normal_5fce97c1c0e19.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/mejigavukolu/marine_biologist_job_information.pdfIn PDF document text
    • http://tinipolevuzow.epizy.com/define_patient_aging_report.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/41301552253.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/bajrangbali_remix_song.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/97768710864.pdfIn PDF document text
    • http://tukuzadixejune.epizy.com/broccoli_cheddar_soup_nutrition_information.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_off0000dad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD7 5308 bytes
SHA-256: 9649229f31d78726f64f938046f43b3caf1f2b2f8301e0cc28d2f299cc996b11
font_01_sfnt_off0000ecd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD9 10696 bytes
SHA-256: 2db3cf05580002cec393934ae124fdfe6f2564ad499b0de75b4fa1e2226b16c1