Malicious PDF — malware analysis report

Static analysis result for SHA-256 325989fad8cb76b2…

MALICIOUS

PDF

69.2 KB Created: 2021-09-28 21:00:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 346eee90257e0b893dc98c709d71be6b SHA-1: 37aadf5da79829c724f3a60b301b53a613106e82 SHA-256: 325989fad8cb76b259cd9b1c1733c933727583df72edd3c30cde502f2a62d5de
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, several of which are flagged as potentially malicious or part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure itself facilitates redirection to external, untrusted sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://licorne-hotel-restaurant.com/userfiles/file/79286109391.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161332f5581810---92486773256.pdfIn PDF document text
    • https://globalcareerclub.com/FCKeditor/userfiles/file/molalegapimut.pdfIn PDF document text
    • http://fuku-zou.com/userfiles/file/51466406350.pdfIn PDF document text
    • http://prvugkh.ru/uploads/files/86978158285.pdfIn PDF document text
    • https://lifesmart.ro/ckfinder/userfiles/files/zorefivibokepalafamisun.pdfIn PDF document text
    • https://superiorservicesandsolutionsfl.com/nbloom/fckuploads/file/29912297903.pdfIn PDF document text
    • http://paletydozahrady.cz/ckfinder/userfiles/files/38414514155.pdfIn PDF document text
    • http://dayou.tw/uploadpic/files/202109171243468214.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/4t361gd01a8hi9jhmc21bmhdva/muvoduxodevipolekogoj.pdfIn PDF document text
    • https://etadelloro.it/images/file/10277957808.pdfIn PDF document text
    • http://seamcc.com/UserFiles/files/51203710935.pdfIn PDF document text
    • http://ndt-ultratech.com/files/nisodivimuf.pdfIn PDF document text
    • http://1night2day.com/UserFiles/file/73813207127.pdfIn PDF document text
    • http://fuerst-architects.com/uploads/file/lumazadesenelakitibijeza.pdfIn PDF document text
    • https://tomorrowhubs.com/upload/users/files/dolukemuributevupolato.pdfIn PDF document text
    • https://webmanagement.jbclub.ro/images/file/sexajenekugulu.pdfIn PDF document text
    • http://0953057778.kad.tw/kads/ckfinder/userfiles/files/15232413604.pdfIn PDF document text
    • http://architettobotteonpierpaolostudioabacus.it/userfiles/files/88982078306.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1613bf849e7f71---19436330494.pdfIn PDF document text
    • http://www.ochoadentalcare.com/tacgestorcontenidos_ochoa/documentos/file/In PDF document text
    • http://tcgardening.com/userfiles/file/2021092220460973499.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=things+to+build+on+a+minecraft+serverPDF 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_off0000afd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFD0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c7e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7E7 11192 bytes
SHA-256: b93ded88e85fb116da1444627f3e6b524f52f4b9720cd7ff3175cc64e78b3847
font_02_sfnt_off0000e1b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B1 14780 bytes
SHA-256: 49fd9a7576fac1fe8a6fed7ee56006f42574fb5f20d9ed6710eea528de4ae4a9