Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a8330afb19ee17e…

MALICIOUS

PDF

87.8 KB Created: 2021-07-09 06:24:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9b974a4e9261c0cdad5788b3a77d04c7 SHA-1: 2d209422c0e255c0399e6397e5a97ed6569ff241 SHA-256: 9a8330afb19ee17e12cda9029d7652497a6dfe70ecf5d163c1d01147dd98b631
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, identified by heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs are designed to lure users to these compromised hosts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b498fbb2093---xesobala.pdf In PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160951b727479b---23833647377.pdfIn PDF document text
    • http://sbox-technology.com/upload/datoteke/46130598833.pdfIn PDF document text
    • http://fitviewer.biz/files/file/zotunug.pdfIn PDF document text
    • http://aranykoronakft.hu/userfiles/file/sesetadesiropupani.pdfIn PDF document text
    • https://store-connector.com/_upload_bilder/_filemanager/file/niroziwawiwozobuka.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/74a5b84d5f75cf9c557dc5ee3a2fb645/39778659559.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/kojabipageguruserivabebef.pdfIn PDF document text
    • https://medtek.vn/storage/file/36644816951.pdfIn PDF document text
    • http://innovatepc.com/userfiles/file/76224962429.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c98fa77fcb---gitikemufazusogodelipalon.pdfIn PDF document text
    • http://xn--k1akb4c.xn--p1ai/userfiles/file/2099145.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb89061a28---wekabikotorupiluvadaribit.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/26273172580.pdfIn PDF document text
    • http://derma-dts.de/files/file/rubetidemozomofe.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/d8e9a044d9f06bf030d3318f0a7ddbb3/55057114688.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/0221ae5b8acd55c73f9c012570232c29/lobidomajomowupekopa.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/b93abf2ac05cdaa1245c5fb23ec8ae95/20976691478.pdfIn PDF document text
    • http://cipetbhopal.com/webimg/files/dawogonunikena.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/7eab287b1f57ecb580ab8e928676bf6f/zavitadakuwitopitinolidas.pdfIn PDF document text
    • https://glycocalyx.nl/userfiles/image/file/memizawamikoxakadekabe.pdfIn PDF document text
    • https://pelicanfinancialnetwork.net/ckfinder/userfiles/files/66982366512.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/0301e7c496f20f85b5a0d1d28e6ff3d3/tabopemufuxovepumefabemix.pdfIn PDF document text
    • http://chi-kara.net/userfiles/file/35490717993.pdfIn PDF document text
    • http://meruzhankhachatryan.com/app/webroot/files/file/52487731531.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=distance+formula+real+life+examplesPDF 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_off0000f254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF254 10844 bytes
SHA-256: 64b52fe17639fad9eb6197e8e34cb66a406339d077c37de1237def038536f99b
font_01_sfnt_off00010b66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B66 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12378 17708 bytes
SHA-256: 7b6040b3ae6482c8732edf2c8f50134667d997cac819488eea7e992be08f6712

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