Malicious PDF — malware analysis report

Static analysis result for SHA-256 09c96e10bbd13450…

MALICIOUS

PDF

79.6 KB Created: 2021-09-10 14:34:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 013ae740c0c052c61474638a722912a6 SHA-1: e38e9d456d9b789063b8e5328304c6381c2bdacb SHA-256: 09c96e10bbd134505d5cf65facb37e0c5e17e1e2dc80e90a5c32cd8015554231
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of embedded URLs, many of which point to compromised or disposable domains, indicating a link farm designed to lure users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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 link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://coretry.ru/uplcv?utm_term=new+assamese+song+2020+download PDF link annotation
    • http://ssteelelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/papinorimefumurizazaz.pdfIn PDF document text
    • http://gardena.crazyrockinsushi.com/uploads/files/xizebezi.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/161397a59dd2e4---ninizebekokoleje.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/kejemoxowuwulujumusu.pdfIn PDF document text
    • http://dulwichtaxi.com/survey/userfiles/files/44247379474.pdfIn PDF document text
    • https://laughteronlineuniversity.com/images/upload/files/gukevanofizolatemuwu.pdfIn PDF document text
    • https://semut73.com/contents/files/71854539529.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/qpsp8m6uvspqbtrkn1b63dbkd5/99744909710.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/161326863a28a5---wemajirigijivopabo.pdfIn PDF document text
    • http://elektrostroy.kz/ckfinder/userfiles/files/tafuwaweji.pdfIn PDF document text
    • https://kattliv.com/kattliv/admin/userfiles/file/kewagilirawejod.pdfIn PDF document text
    • http://com123.vn/uploads/file/97743211701.pdfIn PDF document text
    • http://one9five.com/userfiles/files/93285744899.pdfIn PDF document text
    • https://anninhsieuthi.online/upload/files/62246484813.pdfIn PDF document text
    • http://odnoklassniki-files.ru/images/uploads/files/14529172537.pdfIn PDF document text
    • http://wimborst-ceramics.nl/public/view/upload/fckeditor_images/file/195365859.pdfIn PDF document text
    • https://unique-u.biz/images/uploads/file/83600423930.pdfIn PDF document text
    • http://hlqh.net/userfiles/file/20210909181311_180843466.pdfIn PDF document text
    • http://systemsbiology.at/uploads/assets/file/xivinunefemoxa.pdfIn PDF document text
    • http://mkconline.com/landmark/ckfinder/userfiles/files/nibut.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/gpcfa5l6jai1auq15kkv2mq825/fifimegewij.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612f9917a42f5---todulexisonirefujavixesam.pdfIn PDF document text
    • http://chemonova.com/FCKeditor/file/80736620225.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161377778042ff---sokijugazodezamus.pdfIn PDF document text
    • http://nemochem.cn/upload/files/pununiwok.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/16133adc5acd7d---degiwefimidugebojubakota.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://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_off0000d371.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD371 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB88 10604 bytes
SHA-256: 2d7f059fbab23890c2d7abe280c91a3a76825f81fee1dc35ff048155e34cb5ce
font_02_sfnt_off000103a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A3 17576 bytes
SHA-256: 79e467e459e3a2b2d896eceb7d1ee153ce610556c1140c2cbe65bbb182adae26

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