Malicious PDF — malware analysis report

Static analysis result for SHA-256 962c71533387ebe4…

MALICIOUS

PDF

79.0 KB Created: 2021-04-26 19:05:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 07e7e5f8367db2b90c7f402636c57023 SHA-1: 749e73e4d9ae981a6164ab7d99b769143e9d7f47 SHA-256: 962c71533387ebe4ac971862e88ccec60d01511d73081d7b8118885c43927ac0
184 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure. The embedded links, such as 'https://dafemum.ru/strik?utm_term=how+long+highlander+hybrid+battery+last', are designed to lead users to harmful websites. The document's structure and numerous links suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dafemum.ru/strik?utm_term=how+long+highlander+hybrid+battery+last In PDF document text
    • https://cdn.sqhk.co/mojafefegamo/licrXTk/sijoxutofonirep.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvatagukas/suhIphh/woxesikigi.pdfIn PDF document text
    • https://cdn.sqhk.co/wireriduwude/qpniiCp/kevitime.pdfIn PDF document text
    • https://cdn.sqhk.co/jujifefa/ihgefhj/jokabudilibagita.pdfIn PDF document text
    • https://cdn.sqhk.co/mizenopujoli/3Zhclhi/69496873432.pdfIn PDF document text
    • http://dawaliwiji.22web.org/livre_alphabet_arabe.pdfIn PDF document text
    • https://cdn.sqhk.co/kamozipu/Mxiihaf/8893677067.pdfIn PDF document text
    • http://sayseedokg.com/free_download_games_cooking_dash_3_full_versionq0x77.pdfIn PDF document text
    • https://cdn.sqhk.co/kisesawaropo/5Ehc3hg/81918814359.pdfIn PDF document text
    • https://cdn.sqhk.co/putomikoluku/Ggeiihf/music_player_app_for_android_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/tijovomiv/iiabrYf/ball_and_bricks.pdfIn PDF document text
    • http://changepass.online/tejatifojorona5lhnt.pdfIn PDF document text
    • https://cdn.sqhk.co/litalile/eic8zji/kematavaveperawitipomoban.pdfIn PDF document text
    • http://normaa-id.com/sharp_aquos_lc-32le653u_manualovk7t.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5440e56b-60fb-4953-9750-5f655f1352e2/74642489623.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2639413-a17f-40aa-a09c-33b0f71d9b57/boy_scouts_of_america_abuse_lawsuit.pdfIn PDF document text
    • http://metepukiwameme.epizy.com/bootstrap_table_template.pdfIn PDF document text
    • http://tikawemukotuwaw.rf.gd/14947448530.pdfIn PDF document text
    • http://tujukiji.rf.gd/78615265226.pdfIn PDF document text
    • http://napuganenafu.rf.gd/paluvizorejavadunatigi.pdfIn PDF document text
    • http://kinapemib.rf.gd/48298834097.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e99d24b-be2f-411a-b5f0-e87f10072252/jumonogenekosatifif.pdfIn PDF document text
    • http://joxedebonod.rf.gd/78805349919.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_off0000f632.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF632 5384 bytes
SHA-256: b4bea0f42b9f2bc88a80ceb804fd3dd1e6e7aca6f309a101abe65d06a0bf4b48
font_01_sfnt_off0001088c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1088C 11036 bytes
SHA-256: 9f81ad4a046828b2922ab4f106d394e84f49dd8fe4be45b91016cf5215a598b0

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