Malicious PDF — malware analysis report

Static analysis result for SHA-256 28e499d8e139c54e…

MALICIOUS

PDF

73.1 KB Created: 2021-02-24 20:19:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 3f22931a1f144520639ae63a93488324 SHA-1: 6aca25b9ec3313e09680b6258563ce7c39d5a647 SHA-256: 28e499d8e139c54e94eb9f1dceb7fbff584aa6e38019cd8ae4bc6bd4a4468f46
244 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
  • 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://yafferge.ru/award?keyword=my+sweet+audrina+audiobook In PDF document text
    • https://cdn.sqhk.co/woberimi/hsEBdic/download_game_racing_horizon_unlimited_race_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/lomekojop/HFwggib/wadufuralepi.pdfIn PDF document text
    • https://wixokaregojes.weebly.com/uploads/1/3/2/6/132681478/fff18.pdfIn PDF document text
    • https://ledijonag.weebly.com/uploads/1/3/4/6/134689342/gonazivubarep.pdfIn PDF document text
    • https://cdn.sqhk.co/busumodofu/bK2jho0/tic_tac_toe_classic_glow_apk.pdfIn PDF document text
    • http://datinge.site/como_evaluar_el_liderazgozsy6i.pdfIn PDF document text
    • https://doxeraja.weebly.com/uploads/1/3/1/8/131871607/dibuvunex_tadome_gorokifaleza.pdfIn PDF document text
    • https://cdn.sqhk.co/peposusuwi/iZlkUge/zalojajawulel.pdfIn PDF document text
    • https://najigojuvunijo.weebly.com/uploads/1/3/0/8/130874658/3864484.pdfIn PDF document text
    • https://cdn.sqhk.co/fusaduxuw/dhhjkhb/large_dog_bubble_coat.pdfIn PDF document text
    • https://cdn.sqhk.co/fejovuwov/jhSigje/banezigedenuradubepav.pdfIn PDF document text
    • https://retumitoratosu.weebly.com/uploads/1/3/4/2/134234586/b0b0a16dbdbcc29.pdfIn PDF document text
    • https://ratudizog.weebly.com/uploads/1/3/5/3/135323835/1056113.pdfIn PDF document text
    • https://cdn.sqhk.co/rapowipijes/iblgeWy/zombie_2_movie_songs.pdfIn PDF document text
    • http://islemleriniz.org/download_aplikasi_apk_editor_pro_apkpureyfp9i.pdfIn PDF document text
    • https://cdn.sqhk.co/minamojazi/ibjgA8J/download_tiled_map_editor_for_android.pdfIn PDF document text
    • http://lightstart.xyz/9002244748138v4x.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/lupuvogotog/55279283025.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/game_rpg_android_mod_apk_offline.pdfIn PDF document text
    • https://s3.amazonaws.com/padosumifubobo/ashwamedha_movie_song_free.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_off0000e1c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C8 5192 bytes
SHA-256: bda0fc9198959e794d5f7c33808dfb8ef642331e1dcdd359e338995b9fbaad10
font_01_sfnt_off0000f3a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A2 10484 bytes
SHA-256: 2e62fec05713fd4879bee10a9b3a3bf76c43fca72235c6717fe06e3f7396406f