Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6143f747276e54e…

MALICIOUS

PDF

82.2 KB Created: 2021-09-17 13:22:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 696b7cfd4ec0ab64eb00479e9efa1dab SHA-1: 7b1cf0aa781df3907d9207a7aba7e65e7d0d3662 SHA-256: f6143f747276e54ee5f6a073b13b516358bdb7413d7ec30dfa871b386ada2307
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of 'utm_term' parameters in some URLs suggests tracking or campaign-specific lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://smidgel.ru/uplcv?utm_term=trivia+crack+unlimited+lives+apk PDF link annotation
    • http://eastendmediation.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/demumavolunabolibe.pdfIn PDF document text
    • http://thebodyclubonline.com/userfiles/file/91377196649.pdfIn PDF document text
    • http://nexxosrealty.com/userfiles/files/75746712616.pdfIn PDF document text
    • http://marta-galan.com/files/varios/file/xuxadixu.pdfIn PDF document text
    • http://hoanggiaphatstone.com/upload/files/xijogov.pdfIn PDF document text
    • http://distant-property.ru/fck_editor_files/files/23388343889.pdfIn PDF document text
    • http://emrc.ie/upload/imagecontent/file/jafavukexexe.pdfIn PDF document text
    • http://hgbs.de/userfiles/file/bipanaxajisi.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/88fa17e157fdebed9209482e44c8563f/gibelagegitig.pdfIn PDF document text
    • http://xn----dtbsgbucafmmaf.xn--p1ai/servimages/editor/files/guzevuduwivesobududefera.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/161446b495c0ad---25943117186.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/vimevap.pdfIn PDF document text
    • https://vnmmalta.com/userfiles/file/dokuvipimi.pdfIn PDF document text
    • http://koovappadyscb.com/ckfinder/userfiles/files/54510583096.pdfIn PDF document text
    • http://bsp-oblspl.org/ckfinder/userfiles/files/bobefewonasexazar.pdfIn PDF document text
    • http://stroyindustry.com/userfiles/file/japademoka.pdfIn PDF document text
    • https://sanipacific.com/attachment/file/gikezi.pdfIn PDF document text
    • http://gdlianyu.com/uploadfiles/file/xokujejarinarojerovul.pdfIn PDF document text
    • http://szpk.hu/_user/file/45902052577.pdfIn PDF document text
    • http://omgmediatank.com/userfiles/files/dugemuduzare.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/57a6996983b625167c67037e2da10a1a/94077569204.pdfIn PDF document text
    • http://e-kva.ru/admin/ckfinder/userfiles/files/45584236700.pdfIn PDF document text
    • http://kleinschaden-expert.com/userfiles/file/26168327640.pdfIn PDF document text
    • https://clove7.com/userfiles/file/savinelamuzerokunigipago.pdfIn PDF document text
    • http://w-f-l.de/user_img/file/7033313933.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_off0000dc9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC9F 17676 bytes
SHA-256: 0cb43f9baee9881a51aa51ad50994eb68a811c1343c57213ffb3cc97cf87a3be
font_01_sfnt_off00010a10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A10 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12227 10776 bytes
SHA-256: fc7a032b95af10eca6cf26af93c7c23d8c8d80f77c0377d51b49a70af4a62e73

Open this report in the interactive analyzer, or submit your own file for analysis.