Malicious PDF — malware analysis report

Static analysis result for SHA-256 30c6fe719f7b99fe…

MALICIOUS

PDF

82.2 KB Created: 2021-09-21 14:57:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 48e02f80f023d55448d7185caaa1e73b SHA-1: 122be50de90d7fe83bf117d883f07407e96de9db SHA-256: 30c6fe719f7b99fe4827f68acf8a3fd9c5d159d4eb9cf474b389ba42146c407a
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, many pointing to potentially compromised WordPress upload storage, suggesting a link farm used for hosting malicious content. The 'SE_CALLBACK_LURE' heuristic indicates the document is designed to trick users into calling a phone number, a common tactic in phishing and tech support scams. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence score point towards malicious intent, likely to facilitate further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://volandovia.it/public/fileeditor/file/87233058543.pdf In PDF document text
    • http://vuoncotichdep.com/upload/files/kiwerebuzigonupunad.pdfIn PDF document text
    • https://wolfgang-photography.com/userfiles/files/95092944796.pdfIn PDF document text
    • http://hoteldanang.vn/uploads/images/files/kipaxezijubetudasujuraj.pdfIn PDF document text
    • https://shunnasato.com/kebadabugero.pdfIn PDF document text
    • https://bselink.com/userfiles/file/65855419831.pdfIn PDF document text
    • http://woodlander.sk/grafika/file/tetatubolakox.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/59cafcde44ebaacb04665bbd75fc2000/nemukinugiposonen.pdfIn PDF document text
    • https://nghiepvu.udicmanpower.vn/uploads/news_file/1771264434.pdfIn PDF document text
    • http://awfiowv.love-mrt.com/upload/files/kigokazej.pdfIn PDF document text
    • https://adamslakeband.org/userfiles/file/gewanuroja.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/navekujugexiv.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/xokite.pdfIn PDF document text
    • https://fullgame.hu/uploads/files/viguve.pdfIn PDF document text
    • http://rasmesafar.net/basefile/basefiles/fovulovawus.pdfIn PDF document text
    • http://telecycling.org/files/file/4986388075.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614137dd8bc6e---16845638525.pdfIn PDF document text
    • http://progettarecasa.com/userfiles/files/xetowewekuxexap.pdfIn PDF document text
    • http://ilovehikari.com/uploads/files/nukatogixozasixipasu.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134df2d07329---42378083845.pdfIn PDF document text
    • http://sunway.me/uploads/file/181415215460.pdfIn PDF document text
    • http://www.atccs3.it/atccs3/fckeditor/editor/ckfinder/userfiles/files/zeromagibikotudanogu.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613082249496a---fekebejosozirozub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+get+past+an+iphone+lock+screenPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000d934.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xD934 17680 bytes
SHA-256: 01e2f03f6dbb5ad59fdfd814da90f9db04ed97955e611d88bd50f3a28fb7f469
font_00_sfnt_off0000c123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC123 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF435 17744 bytes
SHA-256: 0dd598e1609213fe42f17aaecb89083fc15a558d0f693cdfd839f7c54f14d885
font_03_sfnt_off00012180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12180 10824 bytes
SHA-256: 42ebb7aeebdcd52d03792c622ca982ebc88f3f4478c33e6aa1c1baa5e3e2edcf

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