Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f2a0ddaf566619e…

MALICIOUS

PDF

93.7 KB Created: 2021-07-13 18:55:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 5654e728b6c1142889866f6df4d10338 SHA-1: 5e9c2080f3a19bb6f10945d2320e4bbb02fa9c2a SHA-256: 7f2a0ddaf566619e33651cad6ab278e763404308fb5af4eaf088c6ea131f78f7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs that point to compromised WordPress upload directories and other potentially malicious sites. The presence of these links suggests the document is designed to redirect users to phishing pages or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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 http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/369a73a1cc32489a8886c4e15eceb31d/vixuwivoromowurekenoto.pdf In PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b741f12687b---pezefakeketasufepovel.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160719b38eaba6---96633182016.pdfIn PDF document text
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/16080371d9e39c---toduredinuzuxafanizinomu.pdfIn PDF document text
    • https://burlingame.com/wysiwygfiles/file/farulokuxujezo.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f0af14556c---nojubuvaxem.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/9mds7e9la01dumjs65b3eq7333/90318822064.pdfIn PDF document text
    • https://bamor.org/userfiles/file/61893976344.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16097d9768f4ee---38890092897.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/crs2ptcoalh8i54agjfosqdecu/jolinoliwupasuku.pdfIn PDF document text
    • https://andana.us/files/files/motuwokidebakena.pdfIn PDF document text
    • https://imotrading.com/images/userfiles/rutanugelukaje.pdfIn PDF document text
    • https://brianhigbielaw.com/UserFiles/file/57096517337.pdfIn PDF document text
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/6b5b2ddb2cdabe2df22cfa5a87be1506/3621859351.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ba5819bdae9---85946449810.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db0c9d7bab8---jezemofozavaduzekixute.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/xadegipobuwezametud.pdfIn PDF document text
    • https://asiarsolutions.com/userfiles/file/9922152265.pdfIn PDF document text
    • https://sport-jicin.cz/dokumenty/sumudadeluza.pdfIn PDF document text
    • https://giridhareye.org/ckfinder/userfiles/files/63192751971.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609a98afd13e0---198429453.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=types+of+reversal+candlestickPDF 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_off000109d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000121eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121EB 17644 bytes
SHA-256: afd1b8ce93870e3e2f8c1d78b1079f27247d2f5043d23fe41807da7b56de7773
font_02_sfnt_off00015047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15047 10848 bytes
SHA-256: edaa1cf185130a8bf460f71596bf7b6e757330def6e106a20a623f5d51b9ffa0

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