Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbba5c14e4138cb8…

MALICIOUS

PDF

112.2 KB Created: 2021-06-25 20:16:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 432690801937f78106e7743a4f59d86e SHA-1: 775b2bcf4329cf6c9671c4f61b8f2983a9ccbdfe SHA-256: bbba5c14e4138cb88699c8bb29b45f452d14dfa2c1130df86806e2e0c53bccc9
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a password-protected archive lure. This suggests the PDF is intended to trick the user into opening a password-protected attachment, likely to conceal a malicious payload from security scans. The numerous embedded URLs pointing to compromised CMS upload storage and disposable hosting further support a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 http://airconbank.com/upload/fckeditor/file/bokajupexiwazeserakutunam.pdf In PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/095877qp1ivvq957kmo2gul70l/71216235710.pdfIn PDF document text
    • https://zegabilisim.com/calisma2/files/uploads/bumomozoxovijajesun.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/676f9b56896ada1bed68de734ecdc2ee/podunatusewi.pdfIn PDF document text
    • https://ikima.fr/uploads/file/refovogesarok.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/4kf615a345rhv56rlqevqagfaj/durimu.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1f1dd04be---kajasubuxizutodo.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083f3803016b---15342905837.pdfIn PDF document text
    • http://rudolphalexander.com/uploads/files/80988217330.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a401cee72af---92577825639.pdfIn PDF document text
    • https://cleaner.pl/userfiles/file/36173344287.pdfIn PDF document text
    • https://bititechnika.com/uploads/file/21932318484.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c677cbb0a5---sipidi.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/cjrs4eg9d532k12kk3r5mj70t0/giditumexavikimaluwerugo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098433557f91---zuzelaxezirufaxasipu.pdfIn PDF document text
    • http://chongthamnguoc.vn/img/files/52373503281.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608a2e9a17daf---botonopoz.pdfIn PDF document text
    • https://banghenails.com/upload/file/vasawemesow.pdfIn PDF document text
    • http://chandigarhdatarecovery.com/files/file/gunilivunupirojew.pdfIn PDF document text
    • http://iaestedresden.de/userfiles/file/51544948430.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16072e8eb57ebd---xevoxamorajumobup.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a626563d30f---3711776262.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=major+tourist+attractionsPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15637 10268 bytes
SHA-256: a73f45e151f314c13085ee4b6a227122562d2a6fad25accf433a4f86aa2a0ffe
font_01_sfnt_off00016d72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D72 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00018584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18584 17720 bytes
SHA-256: 78a6bc223ced02600101bf1cd0ba9019ea9e0f43e9787f68045a0198269d11b3

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