Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc04bd9d9e7717fd…

MALICIOUS

PDF

73.2 KB Created: 2021-09-16 18:52:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5bb34c0bc28482d89ab8b9865248bf96 SHA-1: 0f4dcb190c16f15c47f1b1b0f131fc11b8fab3cd SHA-256: cc04bd9d9e7717fd93a446d7eef7bf9eb4f324ec783bbe41c46bf260c56633b0
164 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, some pointing to potentially compromised WordPress sites, and a heuristic firing for a 'download button' lure. The primary attack pattern involves directing users to external URLs, likely to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crewmak.ru/uplcv?utm_term=panda+by+designer+mp3 PDF link annotation
    • https://franchise-vietnam.com/app/webroot/img/files/gozotofodexe.pdfIn PDF document text
    • https://www.pessin-location.fr/ckfinder/userfiles/files/88819840493.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/49202253197.pdfIn PDF document text
    • http://bobiniauto.com/userfiles/file/41428200867.pdfIn PDF document text
    • http://skomi.ru/img/files/file/34027069342.pdfIn PDF document text
    • https://studioconcept-stand.com/fck_userfiles/file/97752017716.pdfIn PDF document text
    • http://partnerplus30.ru/images/fornews/files/57235951984.pdfIn PDF document text
    • https://fenixfalt.com/userfiles/file/vipirujoban.pdfIn PDF document text
    • http://bscartridge.com/pic/6884814769.pdfIn PDF document text
    • http://villabrown.it/userfiles/files/96518566857.pdfIn PDF document text
    • http://quangcaosmsgiare.com/media/ftp/file/5033785600.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/kkk2f7le4ch5u65frdjlhi6kv6/gawibegujodakoliri.pdfIn PDF document text
    • http://nhac.ditimchanly.org/Images_upload/files/zumovatakizemisojobasejag.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16140c7a9b7a04---zukagudarugidutezalik.pdfIn PDF document text
    • http://geodavidepini.it/userfiles/files/fobixoxivotavuvamobafuk.pdfIn PDF document text
    • http://colantuono.it/userfiles/files/tofabejusejoboxabuv.pdfIn PDF document text
    • http://finadev-groupe.com/userfiles/file/porazatumi.pdfIn PDF document text
    • http://geobigoni.it/userfiles/files/43800009595.pdfIn PDF document text
    • https://www.baust.edu.bd/app/webroot/ckfinder/userfiles/files/virokivijalafigiwutilom.pdfIn PDF document text
    • http://baggiez.net/userfiles/file/32194503731.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/1uh3508jn12uvpjlhs5oaook6c/lajojasoxofemogema.pdfIn PDF document text
    • http://uteambio.com/upload/files/novinizugevore.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613d9989abbc5---83040574982.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_off0000b939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB939 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d14b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD14B 17480 bytes
SHA-256: 99f76298e6a586f0d674af80a356663c98a182c87bbee21b313707bfced62aca
font_02_sfnt_off0000feaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEAA 10900 bytes
SHA-256: e4a7a26eda6287177e95816bbb84ec7f3948214827af87ef0798731c32cda94a

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