Malicious PDF — malware analysis report

Static analysis result for SHA-256 af1bab02991bbcc4…

MALICIOUS

PDF

76.5 KB Created: 2021-03-23 10:59:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 762bdf47db53da356794df2a521196fe SHA-1: 822abfa10fb790e61f3e2b8e100ce3252fe4c609 SHA-256: af1bab02991bbcc410892def359c1faae8db7af3018bf51d3ae3f4e5c6bbad3e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://botokaw.ru/strik?utm_term=what+is+paige+turley+net+worth PDF link annotation
    • http://tovelksa.website/nitopogikibip87ywa.pdfIn PDF document text
    • https://cdn.sqhk.co/xeduwukaxusa/rjjSSw1/81258419862.pdfIn PDF document text
    • https://cdn.sqhk.co/reriwoduriju/ih9HKja/91660479393.pdfIn PDF document text
    • http://soldonlittleton.com/what_is_the_arkenstone638st.pdfIn PDF document text
    • https://cdn.sqhk.co/wizokawoxo/aQhbWja/rugby_world_cup_2020_winner.pdfIn PDF document text
    • http://kir.center/boohoo_girl_gifjujea.pdfIn PDF document text
    • https://cdn.sqhk.co/zidezofa/lzWhigc/zukudeboxedur.pdfIn PDF document text
    • https://cdn.sqhk.co/jomububorava/hjKghUZ/underwater_vr_experience_kalahari.pdfIn PDF document text
    • http://dithetsen.xyz/the_door_in_the_wall_marguerite_de_angelidfceb.pdfIn PDF document text
    • https://cdn.sqhk.co/lepudijazur/gjiezji/ducktales_scrooge_s_loot_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/vutenugade/gsGNGjb/lost_island_3d_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/vunebapenuj/akx3Vig/siren_head_phone_call.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisidumes/bhbMig8/69142501664.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lixanixuzuki.rf.gd/70506954679.pdfIn PDF document text
    • http://zinimivozu.rf.gd/beginning_with_disability_a_primer.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/osrs_steel_bar_blast_furnace_guide.pdfIn PDF document text
    • http://muwiliwus.epizy.com/99752598403.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/quadratic_inequalities_problems_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/minecraft_servers_1._10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f410007d-06ca-4f60-929d-bce21b9aed4c/gejekof.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/99673078518.pdfIn PDF document text
    • https://s3.amazonaws.com/fekife/wizards_of_the_coast_stock_market.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35d32697-253e-4b7d-bd89-6e36d7f88af6/13959164935.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bef5e66-f16b-471e-ab78-d5ca77c80087/what_happened_to_marys_husband_on_downton_abbey.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_off0000eab5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB5 5288 bytes
SHA-256: 6356cb9e6ed221b80e4a0d174fc9e7075f9a4d66bdca30f578aebbe42dfd7fb3
font_01_sfnt_off0000fcc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC8 11732 bytes
SHA-256: 72e59c82c1416c74bb5c113ffc19ba509aa0d94dcc7df6418ec6c6ef055ac879

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