Malicious PDF — malware analysis report

Static analysis result for SHA-256 980be7c509817c93…

MALICIOUS

PDF

83.2 KB Created: 2021-09-22 22:12:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: add2c0fe754c53a337b012f56e605cac SHA-1: 36326775aff2574faf933f92b5ccb14eb7b77026 SHA-256: 980be7c509817c93c49675049fcc5d9570251e0cc67d2badf47c94e4d9ccfd43
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and links to compromised websites, suggesting it is used to redirect users to potentially harmful content or phishing sites. The presence of embedded URLs and the nature of the heuristics point towards an attack pattern involving redirection and potential exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://huntic.ru/uplcv?utm_term=apk+the+king+of+fighters+2002+magic+plus+ii PDF link annotation
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613335bc243c9---70617797014.pdfIn PDF document text
    • http://theclubburger.com/uploads/files/46323026460.pdfIn PDF document text
    • https://7foro.exceltur.org/exceltur_nuevo/ckfinder/userfiles/files/85833525184.pdfIn PDF document text
    • http://assotechne.eu/userfiles/files/kolugitetapekixixo.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/161490bddce5e0---xerobopitonimevi.pdfIn PDF document text
    • http://1night2day.com/ckupload/files/gobakonara.pdfIn PDF document text
    • https://www.leasing.net.in/ckfinder/userfiles/files/disunitum.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/161422a0ce9158---70027469734.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/bdd46b973f636b020bb9bf69bcc832c7/18829654210.pdfIn PDF document text
    • http://gospel-pour-100-voix.com/fichiers/newsletter/file/5870093469.pdfIn PDF document text
    • http://penzionnakrizankach.cz/ckfinder/userfiles/files/bowupige.pdfIn PDF document text
    • http://foto-recepty.sk/images/fotky/65419423648.pdfIn PDF document text
    • http://xn----8sbemnkjd7bfu.xn--p1ai/design/img/upload/file/69800784133.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/gotokazafupimiwetokolaf.pdfPDF link annotation
    • http://swancentive.com/cote_dor_import/admin/ckfinder/userfiles/files/dubuvedukobesoxixik.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/161463a59da5d3---798946446.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/20198794899.pdfIn PDF document text
    • https://srmhomes.com/images/bulk_images/files/natuv.pdfIn PDF document text
    • https://moveo-sport.pl/userfiles/file/74136339246.pdfIn PDF document text
    • http://soupworld.de/upload/file/pakadapufan.pdfIn PDF document text
    • http://wskinbody.com/data/boardData/files/51859915919.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/30bb6dcb6e5282d3e67ccbc2856f8c1b/76978306491.pdfIn PDF document text
    • http://aibrpjoaae2.specialty-match.com/upload/files/93487650534.pdfIn PDF document text
    • https://beytarimcilik.com/admin/editor_resim/file/92231958742.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_off0000ded8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED8 17512 bytes
SHA-256: 24437689bcb2fad733434f399fe1b2bebad565d7f9d16b5a22f35f68409e74ad
font_01_sfnt_off00010c2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C2F 11344 bytes
SHA-256: c5f08fc78ec75317127254551b08c775188f5429b5bc104f9a21812f6ab54a51
font_02_sfnt_off000126cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1