Malicious PDF — malware analysis report

Static analysis result for SHA-256 1af68448b390682d…

MALICIOUS

PDF

88.0 KB Created: 2021-06-26 22:45:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 418cabccb03e611b80604cfe1b9c20e7 SHA-1: b5b67f43876c9b46c1c1d7072de074064337e0d5 SHA-256: 1af68448b390682d1c2cd7d871e0a6fdf50cea32234501a9e984a420e7f40869
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution scheme. The presence of PDF link farm heuristics further supports this, indicating the PDF is used to direct users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbfcfd3d34b---42276117827.pdf
    • http://jucal.es/images/file/turebosava.pdf
    • http://ksnjl.com/userfiles/files/duximemogima.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca6d809b7e---38312733318.pdf
    • https://bamor.org/userfiles/file/jinar.pdf
    • https://ekselantechnology.solutions/ckfinder/userfiles/files/gejabesen.pdf
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/3f42219d36a4329dc59561ff1e6481b9/94389990284.pdf
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076829801684---sipegowakebasobuselu.pdf
    • https://abe-rdc.com/userfiles/file/xuxifuroveremafokisuxo.pdf
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/nnkuvve5nmde8h8uvb9etb1ha7/34261866758.pdf
    • https://sanipacific.com/attachment/file/lonasivekexevibuka.pdf
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/51926417535.pdf
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609820d9f3ae6---71776693325.pdf
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/ml6vl4vkv13gpj4phe1aiqsu6f/zuvidefumerenaxoderigom.pdf
    • https://gemwares.com/userfiles/file/82690595736.pdf
    • https://aduanaldelvalle.com/userfiles/file/sajib.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/fqd8htvbolumb8ucdl4pmthc2t/41654580245.pdf
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/htjktp6gfokcjo05t2phecnl6h/27923367472.pdf
    • https://nestsearch.in/admin/uploads/file/34892061667.pdf
    • http://lblussana.it/images/file/repigavos.pdf
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b645f54b3d---werunuk.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/62468653c43737e78f8a74c7825ee7bf/dawakezukudakemupez.pdf
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/bfb86af950f3708396c530c83f59e91c/tejaxetu.pdf
    • http://dok-vo.ru/userfiles/file/92101517795.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+delete+a+page+in+pdf+android
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0bf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BF 16792 bytes
font_01_sfnt_off000108d6.bin
b16f80cee53ef59bcba6c5bbd4a624865d72ddb96d2b334622df6e623f0fdb59
pdf-font-stream PDF embedded font (sfnt) at offset 0x108D6 10584 bytes
font_02_sfnt_off000120dc.bin
86d2648252e1bd2b560887c6655964fbe00af4cef75c8b28061a28183e603b2b
pdf-font-stream PDF embedded font (sfnt) at offset 0x120DC 19564 bytes