Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d6e5eb90bd9ba6d…

MALICIOUS

PDF

93.8 KB Created: 2021-06-28 23:02:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 04f86e222169b7c2fe9e0bfeb22bb157 SHA-1: cd84435a48873eb3da110370d159fd0185f5c32e SHA-256: 3d6e5eb90bd9ba6d524264a1a74a5bf513414216a3121fd7a64cc132294edc63
176 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised WordPress sites, suggesting a link farm or phishing lure. The 'SE_CALLBACK_LURE' heuristic further supports a phishing or scam pretext, aiming to trick users into interacting with malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/4be9e8052f4143c97712a36451017bc0/9171934292.pdf In PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/eb1f7423a43178d63c7b2d1f8faa81bd/50803325785.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c87ef9673e---niromipozipezujikevubeta.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/11350603862.pdfIn PDF document text
    • http://zuche0551.com/upload/file/48459860287.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/xunorojolerefozamozon.pdfIn PDF document text
    • http://ausafe.net/images/art/files/39678797724.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608462509ff5b---felatame.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608493820da65---34482779589.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/6f4b092f56decb66b887c45ea2ddd0b1/98537574440.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160764f5f74f77---92165024014.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8mnae48m30jr4aro79nonkb0e1/sutetutakex.pdfIn PDF document text
    • http://thunderstar.cn/userfiles/file/20210517151821174121214.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d45c43f1f51---27431493311.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc95d256fe---89233977374.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/1ed53ca97154002b2cb29f840f570e16/51904607137.pdfIn PDF document text
    • http://pinxedien.net/upload/files/64565572782.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608640ee0c8ba---jaxizosalelepirokuxinisov.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c0146a4940a---61475690967.pdfIn PDF document text
    • http://bualuang101.com/backoffice/upload/files/fosux.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/suwoxu.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a7ac5971c---wures.pdfIn PDF document text
    • http://haithuanphat.com/uploads/files/13637880862.pdfIn PDF document text
    • http://shukokai-voves.fr/userfiles/file/25603811128.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609d2948c5643---58273238192.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=double+integral+area+between+two+curvesPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000109dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000121ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121EF 17480 bytes
SHA-256: ff6baa74dc70ffbb36f3676948ffa3000b4f32ccf294d49748212bd14fafe086
font_02_sfnt_off00015079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15079 10800 bytes
SHA-256: b9c58701bcb2746388a0a005c188183565a08456c0dffd4ecc283fd956c9a6e4

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