Malicious PDF — malware analysis report

Static analysis result for SHA-256 93b35b9d3696b4d7…

MALICIOUS

PDF

70.2 KB Created: 2021-02-02 20:44:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d9e3a81943427ec0cfe06bde521a8017 SHA-1: 7c76b098f49d60f28372818d9bb726f796758021 SHA-256: 93b35b9d3696b4d7ef70e595ca1ac8cae9091f72b7cd3f94d798f54369a3d7eb
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also flagged this PDF with high confidence. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest a phishing or redirection attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://yafferge.ru/wb?keyword=learn%20trading%20in%20indian%20stock%20market%20pdf In PDF document text
    • https://cdn.sqhk.co/monasomeb/WUWncS7/wabunuwutuleka.pdfIn PDF document text
    • https://cdn.sqhk.co/baluwofuk/njebgih/troll_face_quest_video_games_2_level_25.pdfIn PDF document text
    • https://cdn.sqhk.co/kivutuzo/hihdvjf/likes_and_followers_on_instagram_apk_mod.pdfIn PDF document text
    • http://xomaweluk.22web.org/norunisamed.pdfIn PDF document text
    • http://bofinaposo.iblogger.org/9741104954.pdfIn PDF document text
    • https://cdn.sqhk.co/fomanazoravu/jfqoJhb/78717471124.pdfIn PDF document text
    • https://cdn.sqhk.co/kawonidoza/iaGSGbs/charm_city_kings_full_movie_watch_free.pdfIn PDF document text
    • https://cdn.sqhk.co/duwokarewesu/ghiaifx/thorough_definition_simple.pdfIn PDF document text
    • https://cdn.sqhk.co/zidexamuwela/mDhgjhA/93027202027.pdfIn PDF document text
    • https://cdn.sqhk.co/gobuwovuv/7x1plST/sodonavoterudafep.pdfIn PDF document text
    • https://cdn.sqhk.co/pifonode/ifgLiet/nabunebujedisiwubigig.pdfIn PDF document text
    • https://cdn.sqhk.co/gukokefa/tiiifNN/servpro_franchise_cost.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxugaveg/Zr56e0I/87387883152.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/zobuwubedak/league_of_angels_2_tycoon_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/size_gain_workout_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/vodalivojobatur.pdfIn PDF document text
    • http://lipaxunuvevi.epizy.com/vebixop.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/guvararu.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_off0000d36f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD36F 5448 bytes
SHA-256: cbe98e26cd692922a17abace687ed622df47efe0216c50619b52450bd4fd639b
font_01_sfnt_off0000e5ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5EF 11012 bytes
SHA-256: d438134b125b13fd01682b34a0a1f0204881886c207ce2b75b3f98204c52c4a5

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