Malicious PDF — malware analysis report

Static analysis result for SHA-256 71f5f387ba39d7ca…

MALICIOUS

PDF

70.0 KB Created: 2020-12-08 18:03:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 085d004e4d4d5c9e6752726f63b6e7af SHA-1: 9fbc69b0d4cb843fb1df666319fa4ef54e5d5dfc SHA-256: 71f5f387ba39d7cad6ee9c5f18fcceb7600a2658adbda98ffe359902c3cd27ec
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious redirector URL suggests the document's purpose is to lead the user to a harmful site, likely for phishing or to download further malware. The 'SE_DOWNLOAD_BUTTON' heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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
  • 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://traffine.ru/123?utm_term=afk+arena+apk+ios In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368741/normal_5f8f6b2ea845a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc1619768612547ed61873d/t/5fc33be97acac6192a294d2f/1606630377487/kafedabewebixod.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ca4260f2895dc1e74bd4/t/5fce6704662d5e24e0d793dd/1607362309483/widinotile.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5a8f52bbd74065826fdfd/t/5fc9b8cd2f5dbb44b77a09a6/1607055565982/wolfchat_play_werewolf_games_and_chat_online.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/javascript_design_patterns_o_reilly.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5a999c14dfd36fe120027/t/5fc8ac0b46ef2e08cbbb9c41/1606986764591/best_photo_collage_software_for_pc.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc07dde27a199023ab34438/t/5fc26ad9cb3e0f57719e297e/1606576865178/daniel_handler_favorite_books.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/80354092839.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc37bd13dfdd95b60e57127/t/5fccc7ee920f47545b919df2/1607256047269/heroes_of_order_chaos_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/canoscan_lide_210_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/fubirojikoben.pdfIn PDF document text
    • https://s3.amazonaws.com/nefagolom/animation_apps_for_android.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_off0000d600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD600 4916 bytes
SHA-256: ca069c6d5c84eee9a17f3ab1c80f675ee1d0ad49da09aa8127d10161c0d1b156
font_01_sfnt_off0000e6d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D1 10908 bytes
SHA-256: 87b252d3080e2bf190d07412538067ca68249b725ee42d336e3a65882654986b

Open this report in the interactive analyzer, or submit your own file for analysis.