Malicious PDF — malware analysis report

Static analysis result for SHA-256 2588844f1667e8e0…

MALICIOUS

PDF

79.2 KB Created: 2021-04-27 02:56:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1a75c34100899c772934ed3672f2c1cc SHA-1: 79a0b5d72e5faabc35ed5c0d8a30f48f64fbeea2 SHA-256: 2588844f1667e8e01584291eb13a624cca31262600b4497272106bf71e6ba279
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, contains text related to 'Settlers of Catan' and 'wkhtmltopdf', suggesting a lure to redirect users to malicious sites. The presence of embedded URLs and the link farm heuristic indicate a phishing or malware distribution attempt.

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
  • 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://ponafet.ru/strik?utm_term=how+to+play+settlers+of+catan+online+with+friends PDF link annotation
    • http://metalllift.ru/software_architecture_document_templatelx5hf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475380/normal_5fdbce30abec8.pdfIn PDF document text
    • http://gooddevice-online.com/el_diario_de_greg_3_pelicula_completa_en_espaol39394.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385435/normal_5fd067ca9036e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411229/normal_604f024f6ab3f.pdfIn PDF document text
    • http://ecoterritory.store/clasificacion_de_las_cuentas_de_ingreso_y_egreso9c76x.pdfIn PDF document text
    • https://cdn.sqhk.co/fefowofuk/icnjbji/lavesebumi.pdfIn PDF document text
    • http://cadenalia.com/tour_the_galaxy_stoooms8.pdfIn PDF document text
    • http://wowitaly.space/mazalofumewozoxekupujowilx37j5.pdfIn PDF document text
    • http://pifedalune.medianewsonline.com/benim_hocam_maliye_video_ders_notlar.pdfIn PDF document text
    • https://cdn.sqhk.co/silutoge/Uihkfoo/zombs_royale_download_mac.pdfIn PDF document text
    • https://cdn.sqhk.co/bexuxoxabim/fhegfsv/passcode_lock_screen_wallpaper_changer.pdfIn PDF document text
    • http://rakadan.sportsontheweb.net/mbbs_1st_year_anatomy_books_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/fogizotufijo/ajFia9p/facebook_video_er_apk_iphone.pdfIn PDF document text
    • http://pasetbs.xyz/diximigumovna4dr.pdfIn PDF document text
    • https://cdn.sqhk.co/potebuso/ijfarjh/kart_racers_2_grand_prix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lesidiwajenowil.myartsonline.com/lukanaxapilipapujepu.pdfIn PDF document text
    • https://9610c43f-1b2a-4a8a-b660-75aaf3908198.filesusr.com/ugd/286fb8_186c9fc75a42436e96ef9162c15ce514.pdf?index=trueIn PDF document text
    • https://88e92b2d-3ddf-41b2-a2ae-4af48bfba274.filesusr.com/ugd/b74686_9fd9e7b76fa14b54892ca672b5bd8d6d.pdf?index=trueIn PDF document text
    • https://f8340159-69ce-4309-ac43-521e9a8475b4.filesusr.com/ugd/bc0b97_d51456cad4d24958843e0b27839cc7c7.pdf?index=trueIn PDF document text
    • https://7fca5364-97a1-4441-b76e-d2c429a59218.filesusr.com/ugd/735424_9b35cc78e7624c78885c56dbc7d82e06.pdf?index=trueIn 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_off0000f8a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A2 5396 bytes
SHA-256: ee17e16d36a03abfa8e69342109b032d1d8fa38667d26b47656fd1515968f010
font_01_sfnt_off00010b0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B0B 10884 bytes
SHA-256: 77ccc317c3465fd1890bea4eaf98089864f322a73eede6719402c7479da13f61

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