Malicious PDF — malware analysis report

Static analysis result for SHA-256 eedb3513bf9ee4aa…

MALICIOUS

PDF

86.5 KB Created: 2021-09-19 11:46:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2011552610cfbbec89507f445f07aeb7 SHA-1: b7a9fd3a3192816456787bbf76f3926ba0ee840a SHA-256: eedb3513bf9ee4aaf9a7510fd1ec17b16fdffa56a127af60fef48ddf7c85767e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous links to external domains, with one heuristic specifically flagging it as a link farm on disposable hosting. This suggests the document's primary purpose is to redirect users to potentially harmful content or facilitate further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://harley.dataroom.tw/upload/files/vusademekoxozoj.pdf In PDF document text
    • http://brkvinc.com/userfiles/file/97684101525.pdfIn PDF document text
    • https://yenicekentkaplicasi.com/userfiles/file/95624423715.pdfIn PDF document text
    • https://harshahometutors.com/uniformkontakt/userfiles/image/files/60019899828.pdfIn PDF document text
    • https://unique-u.biz/images/uploads/file/91828021812.pdfIn PDF document text
    • https://riolisboa.com/images/ul_files/file/SF2L9EctgK3z.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/xixezorinopipemur.pdfIn PDF document text
    • http://svx.su/ffile/file/tedowiruxakopinowo.pdfIn PDF document text
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/91852095713.pdfIn PDF document text
    • http://www.koeru.eu/failid/file/tatefabomewetoxunekuza.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ffbeaec24d---tivilobup.pdfIn PDF document text
    • http://wksx.top/images/userfiles/file/vepizijiwozobetabejanoxu.pdfIn PDF document text
    • http://fuku-zou.com/userfiles/file/31179989864.pdfIn PDF document text
    • https://newcar-rental.com/uploads/files/202109080605064796.pdfIn PDF document text
    • https://fivetc.net/uploads/files/24768535766.pdfIn PDF document text
    • http://csa.china-led.net/static/editor/ckeditor/ckfinder/upfile/files/59449771794.pdfIn PDF document text
    • https://www.prshots.com/ckfinder/userfiles/files/lusobogiposunegeluge.pdfIn PDF document text
    • http://synphabase.ch/upload/file/ravulafedirezusupujovir.pdfIn PDF document text
    • https://pikhospital.com/ck_uploads/uploads/files/bijikotidat.pdfIn PDF document text
    • https://webaprint.be/img/file/livalivetizatadomag.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/69d1ffdb4fe6a25b63166abee8a110cb/jalazakujetemuzonazo.pdfIn PDF document text
    • http://antitumor.org/filespath/files/20210902083100.pdfIn PDF document text
    • http://okna-stv.ru/userfiles/files/todirosefopivamexo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+see+wifi+usage+on+androidPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA17 10660 bytes
SHA-256: 3693a4de1dcce90791cadd3d6e3bcce70f3ead14b4f20713f0036981485104e0
font_01_sfnt_off0001027e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1027E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011a90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A90 19136 bytes
SHA-256: ba353535412de4aaad43fb9ddf914ff0524872442bcc94327286e97b26b3abae

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