Malicious PDF — malware analysis report

Static analysis result for SHA-256 8faae689b13882ac…

MALICIOUS

PDF

70.4 KB Created: 2021-06-15 21:56:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a27d332bf299cfa3b72d21c9c07da335 SHA-1: 30643f1404bc49f657babf3ad1745cf4be563b42 SHA-256: 8faae689b13882acb9373d5eb7efc669bc9536ddd52d02704d2d974aed6c3d31
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is classified as malicious by ML models and ClamAV, indicating it's a phishing or trojan delivery mechanism. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to movie search terms, aiming to trick users into clicking the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9684

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://krisoc.ru/uplcv?utm_term=shaolin+soccer+full+movie+english+dubbed+watch+online+free
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/b6226b1c180edcf6490f289b2a8e1a41/11859323275.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/16078a63924abd---50332296855.pdf
    • http://www.chiringuitomediterraneo.com/ckfinder/userfiles/files/71657275846.pdf
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa015d317b---pezuxitabegiwonodinoxe.pdf
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/4be64d347dbd952639129534459963d5/65320636345.pdf
    • https://ahha.az/userfiles/file/sanitigagogebakexabemi.pdf
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/e40b94fe85e35fca8b52b2a8fdbc0219/meminubeduxu.pdf
    • https://hfdjet.com/wp-content/plugins/super-forms/uploads/php/files/cdf76eb5157fcd41b1a34571c4a89086/legusowakik.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c4fa9232f51---6330155091.pdf
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9ec6e85ef---68912220186.pdf
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/f4frud216144987johpiv4qta6/91034185198.pdf
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/dee3068d67c1a103d725b61e23cb19f7/gulojapidajafabekugare.pdf
    • http://www.annaleehuber.com/content_files/file/rupenimaxovavosefuteti.pdf
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/lrndgllqoc4ipjcfis785j2i52/zaxoxofofukegotij.pdf
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b97029da818---21841927130.pdf
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a39da9ee214---niwoxegizamo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f02e.bin
fad315c0149b5a039eb9e1ff33c86e7b073270c9f15f8e4de7a454e21b5ca0a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF02E 5828 bytes

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