Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b7ad62a4f41a8a6…

MALICIOUS

PDF

88.2 KB Created: 2021-08-09 20:30:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1cb11156412ff74e55153352fc1b2153 SHA-1: 3878821585a31076df71afaf3695df85e83f7e09 SHA-256: 4b7ad62a4f41a8a60355308cdff3928b2c8549d7f943dc26efea51deb151a4b5
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress sites, suggesting a phishing or malware distribution lure. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway security. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9914

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/q7cvei943nt6gijtlh57ujc49v/11651742068.pdf In PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/fc6e6f3247d145f769cbf9b60e6939de/litonosixotuzun.pdfIn PDF document text
    • https://rockdental.co.uk/wp-content/plugins/super-forms/uploads/php/files/3905a4514c6af7ce902e1533a0ba8f4f/50735864737.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a847d45e42---duxanuduvuxesasevumam.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/c2427ffc96fd7a7d876dc3aeba253664/sovafukajida.pdfIn PDF document text
    • https://iwistw.com/upload/files/65096762086.pdfIn PDF document text
    • https://oykufestivali.com/ckfinder/userfiles/files/zisebanefulopiwusot.pdfIn PDF document text
    • http://playbabydoll.com/userfiles/file/87157776522.pdfIn PDF document text
    • https://www.tamilsaga.com/ckfinder/userfiles/files/30582189637.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/d9b1936ed71e3c70e87fc5e49a73b2ae/sujut.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096880335ba0---5167905976.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160b804f7a202e---siroj.pdfIn PDF document text
    • http://pvhs1980reunion.com/clients/e/e5/e5e9f74eb83211af097e98bf68d59c4c/File/63206803504.pdfIn PDF document text
    • https://ijmscr.com/ckfinder/userfiles/files/14273447570.pdfIn PDF document text
    • https://aradmissions.com/ci/userfiles/files/18469646076.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/5866504d34b5e7d618c6bec83d6bfcca/jenezajapujemufupowivofa.pdfIn PDF document text
    • http://auxerretv.com/content/public/file/pofidateke.pdfIn PDF document text
    • http://szpital-sulecin.pl/images/fckfiles/file/zezezamo.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d8a361df8f---saferodiwad.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608240546f173---43708044455.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/ds25ag6361tjponve5l35c4703/81182671014.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/46d1028b2f54a9484f7375c78d54261b/koxinuvosilosibi.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/winumatefik.pdfIn PDF document text
    • http://bisenzia.it/userfiles/files/50907830461.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/tiravowinafuloguwawu.pdfIn PDF document text
    • http://deckdreams.ca/clients/3/34/34055ef41782f8f15ebf372c1e39ecad/File/4601812097.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=descargar+dragon+ball+z+budokai+tenkaichi+3+ps2+iso+espa%C3%B1olPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D5 19336 bytes
SHA-256: e2538e66b7bae70b00c676c9cd53817c86ffe1490d2cf98f3f66b42c07231804
font_01_sfnt_off000110e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110E7 2328 bytes
SHA-256: 97ec669d954d95f7f11ed1d7b8736228109f07c966ab3d6524b1aa4964609446
font_02_sfnt_off00011b3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B3F 11684 bytes
SHA-256: fbe16debae608a52c51b161c288178e010e592d072f14498c91918c8e84ee043
font_03_sfnt_off0001367e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1367E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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