Malicious PDF — malware analysis report

Static analysis result for SHA-256 35535d901b0a6f05…

MALICIOUS

PDF

61.3 KB Created: 2021-01-23 16:54:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0148c3300c287b3f1caf0e1f86819c53 SHA-1: 8c930708986c9d450f5412021f3be3ff9bf662c4 SHA-256: 35535d901b0a6f055dc51365c089c3cad3dc90946cbd3e9c37ffa6bbfca76cdb
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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://crophysi.ru/wb?keyword=fantasy%20character%20name%20generator%20male In PDF document text
    • https://site-1191111.mozfiles.com/files/1191111/drift_hunters_unity_studionum43.pdfIn PDF document text
    • https://site-1166739.mozfiles.com/files/1166739/sniper_ghost_warrior_4_contracts_review.pdfIn PDF document text
    • https://site-1178466.mozfiles.com/files/1178466/92798984500.pdfIn PDF document text
    • https://site-1173313.mozfiles.com/files/1173313/traxxas_link_app_update.pdfIn PDF document text
    • https://site-1166703.mozfiles.com/files/1166703/26125137335.pdfIn PDF document text
    • https://site-1246992.mozfiles.com/files/1246992/81131462314.pdfIn PDF document text
    • https://site-1174092.mozfiles.com/files/1174092/avatar_maker_witches_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/tejurorado/6XQhhha/fawemagalino.pdfIn PDF document text
    • https://site-1180493.mozfiles.com/files/1180493/fire_stick_free_vpn.pdfIn PDF document text
    • https://site-1228018.mozfiles.com/files/1228018/92389566910.pdfIn PDF document text
    • https://cdn.sqhk.co/diwiporeb/fO4gdji/62486984831.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jowuwivipi.rf.gd/88967103178.pdfIn PDF document text
    • http://vikogen.epizy.com/rhel_6._5_32_bit_iso.pdfIn PDF document text
    • http://kifugelewepin.epizy.com/1295936018.pdfIn PDF document text
    • http://fetufebutegiv.rf.gd/julelazijizipijajulofalej.pdfIn PDF document text
    • http://wojobawezelo.rf.gd/baaghi_movie_all_video_song_free.pdfIn PDF document text
    • http://waxuxeg.rf.gd/sinameserunenupugitupa.pdfIn PDF document text
    • http://validexa.epizy.com/antivirus_free_full_version_kaspersky.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_off0000b759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB759 5268 bytes
SHA-256: 7683d5c451e939a536038d08a2dd2d7d4ff66e3cc2cc53a5ca1b6cb57ac90f01
font_01_sfnt_off0000c923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC923 9204 bytes
SHA-256: 271a727512ac87b8838fbbd168bc08fea1abd3901ae450b0869f9dc19665c598

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