Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a7e9fa4beae1cd4…

MALICIOUS

PDF

98.1 KB Created: 2021-06-26 00:42:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: cbd25eee28b2453c2440bffb490cef13 SHA-1: 07a7a01ff41e26452b79d1ddb623b1950206729a SHA-256: 1a7e9fa4beae1cd49b9661ef7b16aee170fa5dad991a5cce842359e48bf7ddb7
156 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised WordPress sites, indicating it's designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure points to a link farm for initial access.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16082ded04b012---guxodiserunikirikabak.pdf In PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/9d1386054d4257b194a8dc667673a299/kagodonisidutibuzigavesuj.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/1609f8838bdbac---17534640980.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160709e753ba19---47493757381.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a0301bcefa---48726804560.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a46cb706115---vugegi.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/fb438f40f82eb2643c67e618383d3831/6509376574.pdfIn PDF document text
    • http://beiwendq.com/userfiles/file/3311904238.pdfIn PDF document text
    • http://www.startservis.sk/novy/ckfinder/userfiles/files/zudagoxakejeletiramuketez.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca95a6b14b---89738080829.pdfIn PDF document text
    • http://bioident.pl/photos_fck/file/sutebakobazusunisisijojot.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a07295556---perefakuzi.pdfIn PDF document text
    • https://praward.tw/wp-content/plugins/super-forms/uploads/php/files/dea2dab303bff9e20bfbcdd89c34efe4/44519918061.pdfIn PDF document text
    • https://paperland.bg/uploads/file/12494950596.pdfIn PDF document text
    • https://elektrona.cz/files/file/waxuzejege.pdfIn PDF document text
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/ktb159opbr0782se83bgrfrtpn/70036569840.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/4bcc733187d48cd0ea1dca5df9839dc2/vogakom.pdfIn PDF document text
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076626c40029---xegumozuwevutorunodixonon.pdfIn PDF document text
    • http://allycatering.com/userfiles/gepolemedajubapigopos.pdfIn PDF document text
    • https://mytopics.it/uploads/file/mitafolox.pdfIn PDF document text
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/fbb8837324ada60e9479e3306f2ee1b3/zutifixaj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=white+and+red+house+exteriorPDF 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_002_off0000fe0a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xFE0A 17668 bytes
SHA-256: eed71b0bc98795d2e57c74c0f087d59ca5d06c0bb10e6a921bbbe7253c3a5d05
font_01_sfnt_off000118ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000130fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130FE 18276 bytes
SHA-256: ee787ae1f18e336464d46232f6854f61ab563821529fd5db408e0413dda6e2d6
font_03_sfnt_off00016172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16172 10492 bytes
SHA-256: eb86d317199a5a3571e472b1db7a843174b236c6cebc97ef6bf156eda29df210

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