Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdc6289c130efe89…

MALICIOUS

PDF

82.0 KB Created: 2021-08-17 15:07:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ca6a29b85c47c97e61b397f4b199ce61 SHA-1: c7e80c9d7efae261075f9b9afccc08353fe80de9 SHA-256: fdc6289c130efe892b1ad78209adfaafcfe5ac2cd60da9596a9f711144e41ca0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous URLs pointing to external sites, many of which appear to be hosted on compromised CMS platforms or disposable domains. The presence of embedded URLs and the overall structure suggest an attempt to lure users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://allytemp.ru/uplcv?utm_term=acidos+oxacidos+ejemplos+con+las+3+nomenclaturas PDF link annotation
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/i6j5h7s9jh3k7nu9c14kavtnkc/dufujaxuborixulisamuzexed.pdfIn PDF document text
    • http://nhasachthunam.com/upload/files/wuwobudutuvo.pdfIn PDF document text
    • https://zlatartopalovic.rs//files/79963267415.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/bc0957606bc17b103cb63882333b81c5/molarafezelizeb.pdfIn PDF document text
    • http://cissi.it/userfiles/files/bijofarawakexu.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/e3e4625d83f41005dd9af7de4882f6f7/nomezoraduxavaretedadike.pdfIn PDF document text
    • http://burragebrothers.org/demo/jolie/beta/userfiles/files/nefoj.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084dd899eca3---nijudoxilijilen.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607beaec0184d---mewowajimaxemiwimok.pdfIn PDF document text
    • https://aykutemlak.com/upload/ckfinder/files/nalomuwezilim.pdfIn PDF document text
    • https://flexi-cms.com/uploads/file/67036212448.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/6b73ade1eb559d20bc4ec3a8bc9f83d1/latiku.pdfIn PDF document text
    • http://profil-metall.de/content/uploads/file/99954150733.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c05b18a43be---3703820755.pdfIn PDF document text
    • https://sinhadventure.com/uploads/file/rimorozep.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608e17b279b33---zuguvijat.pdfIn PDF document text
    • https://lifesmart.ro/ckfinder/userfiles/files/welunered.pdfIn PDF document text
    • http://cgemfoco.com.br/ckfinder/userfiles/files/pegomexipujewi.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16111e47c9d247---40058193126.pdfIn PDF document text
    • http://cameranichietsu.com/luutru/files/basisufe.pdfIn PDF document text
    • http://stinpo.com/ckfinder/userfiles/files/nileworuwanovuzegusopu.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/5b608421d1a4cb9dd8dad51f8cbc3cd7/domovazuwowumavej.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/wokelapokovupemavedog.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16083263a02e9f---38576647091.pdfIn PDF document text
    • http://alliusie.com/userfiles/file/25775248620.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_off0000d978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD978 17312 bytes
SHA-256: 8e13c034117be5b5470668e17929f1b38ef9c28856a79c055d1ce6ac7f79c33b
font_01_sfnt_off0001052b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1052B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D42 11160 bytes
SHA-256: 3ff6b894cb9b1815195c1ce7edfcf2a8462eeb8ad7e46b9a469a861b142073a4

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