Malicious PDF — malware analysis report

Static analysis result for SHA-256 f02acbedd14c0898…

MALICIOUS

PDF

88.2 KB Created: 2021-03-19 20:39:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb3ce73525b38fba68af7e7a11a65a2f SHA-1: d1d20508a422423cf1bf8d2fb112d71b397c9046 SHA-256: f02acbedd14c08982934f8956354fd084ba67196911fd5a34b3473e7ef4918a4
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL pointing to a domain associated with phishing and malware distribution. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to manipulate search results or distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://midufefew.ru/award?keyword=define+teaching+strategies+pdf
    • http://mritzoliver.design/auriculoterapia_puntos_maestros_chinoslbaqf.pdf
    • https://cdn.sqhk.co/dedejosewor/jj4jgie/off_road_trucks_racing_on_pavement.pdf
    • https://cdn.sqhk.co/kopilixa/jdvViaH/vice_news_reporters_salary.pdf
    • https://cdn.sqhk.co/xedasuzefer/AbidlWb/white_noise_lite_machine_walmart.pdf
    • https://cdn.sqhk.co/silijebutu/gepgrgj/stickers_game_of_thrones_whatsapp.pdf
    • https://cdn.sqhk.co/wadupaxi/8gdVgiB/7802495265.pdf
    • http://praktika-ingenieur.com/11026744153dwswi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://97a45c9e-1ab5-462a-bfe2-fded34b9a8b9.filesusr.com/ugd/b50c55_3c5daad03f8741a785b073a08e54bb2c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/6200bb07-23c6-4554-b1de-c06ed948311f/foripolotuxuvepexikigoja.pdf
    • https://s3.amazonaws.com/vigevot/wikej.pdf
    • https://uploads.strikinglycdn.com/files/fb67476d-1ea9-49cc-9148-6a93ca2abb82/brother_drum_light_blinking.pdf
    • https://7e70056c-c2aa-4e53-98c5-50750123c107.filesusr.com/ugd/f8ae5d_f51d4cd532b64f2aa13081a93bded916.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3b4b1781-db58-4087-a59a-7017496f93b4/karakidezo.pdf
    • https://uploads.strikinglycdn.com/files/1d44672f-c97a-4c32-856b-5df44e832100/37323817525.pdf
    • https://uploads.strikinglycdn.com/files/d59678b3-7718-4e8d-89f4-920f35e44282/bushnell_yardage_pro_sport_manual.pdf
    • https://s3.amazonaws.com/divelatoxa/87751125731.pdf
    • https://uploads.strikinglycdn.com/files/f3a2901f-38ec-49a6-b740-fcdfe5832881/jiwelone.pdf
    • https://uploads.strikinglycdn.com/files/e5dbbc3b-0344-4646-b0f8-2f209e6dc25a/sea_of_monsters_full_movie_plot.pdf
    • https://1a9cd40a-f0d6-44d4-a143-19288280ca2b.filesusr.com/ugd/7a13df_10566be219fb47889c5d651298d2cfec.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011dfe.bin
8bbac18f3217b100861dbc2999547e514d81e260428554a24a7753037da49f50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DFE 5384 bytes
font_01_sfnt_off00013051.bin
e03e7386bea7cdd3ddb3c143285549f8dff9fcd633d70eb54a8088191d474bdc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13051 10440 bytes

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