Malicious PDF — malware analysis report

Static analysis result for SHA-256 5583aabfadf45e6c…

MALICIOUS

PDF

89.3 KB Created: 2021-07-28 00:16:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-04
MD5: 08fbf3934513f119ba37ba7efa442ab7 SHA-1: 67c08b7ab9ec90a5038cf93c5ab001a005d1774e SHA-256: 5583aabfadf45e6c7be29a4ad45a31f150d92af1263a529546de92f58e91a041
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised websites and disposable hosting, likely intended to lure users into clicking malicious links. The presence of these links and the overall detection as a phishing trojan suggest an attempt to deceive users, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/c12ee3cdee7f0c178ed7edda0bc58929/20426234589.pdf In PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1607b7164bbac0---sipesaliguxu.pdfIn PDF document text
    • http://dcbestwings.com/uploads/files/nuvobizalujozupoxoral.pdfIn PDF document text
    • http://odpadykj.cz/UserFiles/File/59451262082.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/f5147fdf4221ddf90ac79b64a4bb812b/24391555956.pdfIn PDF document text
    • http://www.accl-calibration.com/login/ckfinder/userfiles/files/50671762968.pdfIn PDF document text
    • http://davisfolk.net/clients/1/1f/1f1070e31f35868a9a13f38ee7dc887f/File/sirilebazebuparimuzulatu.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071ab9b97ff0---51928419800.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/bc48a0d855b31a95857d173edb101838/50573419109.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/16082e1ad988fb---nomulujikukoxexabomo.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/16073bdc52a973---86194047787.pdfIn PDF document text
    • http://bsa.by/ckfinder/userfiles/files/27182693442.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/nn29at3qven7886jb0rgj6agps/vupanafowozabuzunukuwip.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adca3b4f07e---merukugigesekopopizaj.pdfIn PDF document text
    • https://cihangirhotel.com/upload/ckfinder/files/xomazugi.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/76f9586daeeca78ffe66900af5ef4066/fuvediruzitiba.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/totowotezuvugegusuxiril.pdfIn PDF document text
    • https://fivetc.net/uploads/files/xakovumurokexetukul.pdfIn PDF document text
    • http://lagunaapartman.hu/images/user/file/pobefajidazi.pdfIn PDF document text
    • https://shatalarab-llc.net/userfiles/files/8165861017.pdfIn PDF document text
    • http://cnzgks.com/userfiles/file///35917885662.pdfIn PDF document text
    • http://coss-wynn-reunion.com/clients/d/db/dbe3622004495b304d8703879a486b7d/File/toguvuviruwasigejiluwa.pdfIn PDF document text
    • http://ipceurope.com/assets/file/29731611792.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=how+to+make+debit+note+formatPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA70 16864 bytes
SHA-256: 9e3590d8425e457639fd3db96da79f1cec88e2c47385a58ffc421b1a0d021142
font_01_sfnt_off00012672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12672 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013e89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E89 10612 bytes
SHA-256: f5dc57ec76bdf7d1697eecee2aebc3f9fb10730f8676db63b9adaf2d889ced27

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