Malicious PDF — malware analysis report

Static analysis result for SHA-256 930216e11ba1966f…

MALICIOUS

PDF

85.0 KB Created: 2021-08-26 08:16:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: dc2346360f0e811840212cfce5e6261d SHA-1: 511189103cbe8dc6b952e0983569b4dd801ca55d SHA-256: 930216e11ba1966f395883c5ce6ac8f99c2fcaddbb3fa5f9c02c8aec708e91da
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised WordPress upload directories, indicating a link farm designed to host malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of multiple compromised CMS upload links and disposable hosting URLs points towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609dbc5ce5fd7---20468556031.pdf In PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611bea24054cd---58797472428.pdfIn PDF document text
    • https://mongolia-volkslift.com/uploads/files/dinemilojibulezej.pdfIn PDF document text
    • https://zlato-eu.cz/upload/files/45038014459.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7832ccf27---ralexojewaluvakalilakok.pdfIn PDF document text
    • http://drukarnia-skawina.pl/app/webroot/media/files/99146691785.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/1450ff6e17a9faad5777cce2a2b1ad00/gimimewusebavugazozagir.pdfIn PDF document text
    • http://studiovalentini.eu/userfiles/files/simotulemenadolawumonasup.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/e448bcb2551dadc05bba27ed27d4225a/watamitizebewuwom.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/c8e7b4c93165de3dba464ade0f16dcdf/nivizidisapupikos.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bbb604020d---26791107616.pdfIn PDF document text
    • https://renetravel.ro/images/files/12365692801.pdfIn PDF document text
    • https://markiza-trade.ru/admin/ckfinder/userfiles/files/judab.pdfIn PDF document text
    • http://biatlonbreza.sk/editorfiles/files/77073532747.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/7366a0cec1379b2f6dfea752006650c7/tejetubitiwod.pdfIn PDF document text
    • http://abwmechanicsville.com/uploads/files/59149054845.pdfIn PDF document text
    • https://camping-du-lac-dijon.com/fichiers/85194803304.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160978b872e73d---95709465726.pdfIn PDF document text
    • https://ykitraders.com/UserFiles/file/1372802308.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/vtgloc804m4vbsfldhlco5sou2/fidojesatabarivagu.pdfIn PDF document text
    • http://movitecnic.fr/ressource/site-image/files/21250815209.pdfIn PDF document text
    • https://hitpoint.tw/userfiles/file/45687750619.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=difference+between+noun+clause+adjective+clause+and+adverb+clausePDF 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_off0000e5df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DF 16580 bytes
SHA-256: e4de512b91d228fb80c1984a7a8355b9fe26c857f2161fbc01f52f816087e5f2
font_01_sfnt_off000110f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001290e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1290E 10992 bytes
SHA-256: 470fb282de7a717e14fc3bc4c4d9a389fb3c557152731f2aca1fc589e060ad79

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