Malicious PDF — malware analysis report

Static analysis result for SHA-256 b483f7254be76ff6…

MALICIOUS

PDF

70.7 KB Created: 2021-01-24 07:26:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 33b6f204b660b645752a95ba9e4d0d51 SHA-1: 6931eb88f3cd1661aa1ea2303c1ae9c0f376f9d4 SHA-256: b483f7254be76ff62835bcc27336f1ebea40c31b8f8406544ad85ad71018a07f
244 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
  • 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 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.
  • 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://traffmen.ru/wb?keyword=cooking%20fever%20hack%20ios%20download In PDF document text
    • https://cdn.sqhk.co/figakeves/h2ujijj/vintage_motor_racing_jackets.pdfIn PDF document text
    • https://cdn.sqhk.co/gituridewo/XjcshgI/kuzuxejonogetigijalodab.pdfIn PDF document text
    • https://kisobodowawon.weebly.com/uploads/1/3/1/3/131384145/5466291.pdfIn PDF document text
    • https://cdn.sqhk.co/kewudomavave/Rqhc5hj/corrugated_box_manufacturers_in_dallas_texas.pdfIn PDF document text
    • https://site-1178425.mozfiles.com/files/1178425/steam_link_android_without_controller.pdfIn PDF document text
    • https://cdn.sqhk.co/kufalavoxig/NVhegfH/2179305017.pdfIn PDF document text
    • https://site-1238130.mozfiles.com/files/1238130/dulutulutuzomeve.pdfIn PDF document text
    • https://cdn.sqhk.co/munuluxel/8yEK8PP/juvisep.pdfIn PDF document text
    • https://site-1173349.mozfiles.com/files/1173349/9373814701.pdfIn PDF document text
    • https://cdn.sqhk.co/lilanoto/cjghdib/espn_fantasy_baseball_playoff_tiebreaker_rules.pdfIn PDF document text
    • https://cdn.sqhk.co/marixefe/iiazhh4/2_player_games_on_playstation_4_free.pdfIn PDF document text
    • https://reropazorulofo.weebly.com/uploads/1/3/4/4/134437501/3ee710609f.pdfIn PDF document text
    • https://birirewenojitu.weebly.com/uploads/1/3/0/8/130813362/gireboju-fosefagisumed-fejifibazo.pdfIn PDF document text
    • https://jesisime.weebly.com/uploads/1/3/4/8/134886507/vuxopoj-natuze.pdfIn PDF document text
    • https://cdn.sqhk.co/rapavuse/NcjcVig/minecraft_godzilla_mod_1._14_3.pdfIn PDF document text
    • https://site-1193440.mozfiles.com/files/1193440/xenowerk_apk_mod_revdl.pdfIn PDF document text
    • https://cdn.sqhk.co/pifixijowoka/8NjJhg3/xilanejipilapar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d7bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7BB 5404 bytes
SHA-256: 0163933b784014862470a36feda2496c0623df7ab561ec7fdfee8c5069dd4a39
font_01_sfnt_off0000ea32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA32 10480 bytes
SHA-256: 51ad528d7d64c10b8106d3490580413228d9e5d741b56bfad187c4933a8d81b3

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