Malicious PDF — malware analysis report

Static analysis result for SHA-256 af16a82b407a4635…

MALICIOUS

PDF

73.2 KB Created: 2021-02-26 06:17:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 319fc704554db6dc7bd3bea97184d7c6 SHA-1: 16da9320ebae304eab784e2f6024dc20832ffa91 SHA-256: af16a82b407a463501e9af7d687a7a1d8943cc001290fa8b7c5f5ab004aec3e2
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://bologen.ru/award?keyword=dream+interpretation+snakes+everywhere PDF link annotation
    • https://tafiweva.weebly.com/uploads/1/3/5/9/135993394/boponalimukam_vikapepomuvu_zuwodu_bapagez.pdfIn PDF document text
    • http://nejevefivi.mypressonline.com/is_dork_diaries_a_nonfiction_book.pdfIn PDF document text
    • https://cdn.sqhk.co/nadetajagupe/5tjcgjE/stickman_war_zombie_attack_survival_games_ps4.pdfIn PDF document text
    • https://cdn.sqhk.co/komagiju/hsOjchc/wutetimejiwivida.pdfIn PDF document text
    • https://cdn.sqhk.co/kewixoretuze/cEhiNHv/jepexodefog.pdfIn PDF document text
    • https://tuminiride.weebly.com/uploads/1/3/1/6/131637714/9dd6d88ba0.pdfIn PDF document text
    • http://puveputado.sportsontheweb.net/briggs_and_stratton_platinum_7.25_190cc_carburetor.pdfIn PDF document text
    • https://cdn.sqhk.co/biluvetizom/VTifwtQ/fifa_world_cup_2022_qualified_teams.pdfIn PDF document text
    • https://cdn.sqhk.co/kupejabel/idhCohb/idle_factory_tycoon_wiki.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bajuse/zekefokipuji.pdfIn PDF document text
    • https://s3.amazonaws.com/gimisorixosu/68689551388.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/rinujorasakefubuxamof.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/mekudumaverojalelefe.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/zovudodibedogojabusomigev.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/in_flanders_fields_sheet_music_piano_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/69194017907.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/reading_comprehension_multiple_choice_worksheets_grade_7.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_off0000e337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE337 5344 bytes
SHA-256: 21bc04f37b1519f91e1ba0c5695c259cc39e6219f2df022c4b172cc0e76a7574
font_01_sfnt_off0000f553.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF553 10172 bytes
SHA-256: d62a44765145211ff70209a6e2c7194564f8d834904dd0ec10c20bec2d22fc22

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