Malicious PDF — malware analysis report

Static analysis result for SHA-256 a06dc4b8a5751b6a…

MALICIOUS

PDF

82.9 KB Created: 2021-09-17 17:12:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d30e82f72dbd5de77ab56391e8bff6de SHA-1: 9ef6d9ddb23d2f31d2cb250f4e689e5d2859f2a2 SHA-256: a06dc4b8a5751b6ae18982d865e455a2e155fa60d0a45e63132a3204c292ac0d
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ClamAV as a phishing trojan. It contains a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting an attempt to distribute malicious content or conduct phishing. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of multiple compromised links indicates a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 8

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • AcroForm button with action trigger low PDF_ACROFORM_BUTTON
    PDF contains a /Btn form field together with a SubmitForm/URI/Launch/JS trigger — this is the building block of fake 'Download' or 'Open' button overlays used in PDF phishing lures
  • 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://hutnia.pl/userfiles/file/2183706042.pdf In PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1613f0961c7141---nukuwutewoxuvu.pdfIn PDF document text
    • http://hani-bee.com/userfiles/files/jigufamafazitafawuziti.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/dfa88e312c9af0d2cf09a75792ace567/20470128365.pdfIn PDF document text
    • http://cec-intl.ru/app/webroot/files/file/towadefaxuworutu.pdfIn PDF document text
    • http://wieswioska.pl/userfiles/file/69594826279.pdfIn PDF document text
    • http://dreesmann-foto.de/userfiles/file/limori.pdfIn PDF document text
    • http://avon-bratislava.sk/files/files/18856721624.pdfIn PDF document text
    • https://debo-fit.be/userfiles/file///93677214453.pdfIn PDF document text
    • http://96stone.ru/userfiles/file/38241962610.pdfIn PDF document text
    • http://qianxish.com/ckfind_image/files/kexilube.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16135bbc965231---51523971148.pdfIn PDF document text
    • http://xn----7sbabaajmdfbk3ddf3azka3b6a2r.xn--p1ai/ckfinder/userfiles/files/xovemirijug.pdfIn PDF document text
    • http://mathrainbow.com/userfiles/file/96469171220.pdfIn PDF document text
    • https://x-leather.com/radsportfiles/file/nusivigomugulepivukirik.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/t25abcric9j017o5628h7irpg0/japinexezosijezekubodetop.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/49933c7316630679d919b325ed4cc1e7/3187636260.pdfIn PDF document text
    • http://tieulongcopro.com/luutru/files/xuwukotoxo.pdfIn PDF document text
    • https://fundacjaartfreeart.pl/userfiles/file/94469435286.pdfIn PDF document text
    • https://madame-tina.com/ckfinder/userfiles/files/kefatixoma.pdfIn PDF document text
    • http://smolensk-bakaleya.ru/userfiles/file/tusujaxof.pdfIn PDF document text
    • http://gewald.ru/content/Files/74243464871.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+transfer+pictures+and+videos+from+android+to+iphonePDF 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_off0000ddeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDEB 11084 bytes
SHA-256: f32462186f3cc003ea17547f59e81d836c93d904c9c32a9f470cfe73a90b817d
font_01_sfnt_off0000f797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF797 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010fa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FA9 17952 bytes
SHA-256: 0a0c5fde2039d807d038d12b839be5b5d96dc5c7092ebe560d4abf6f27aa8c08

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