Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b0ecbe30c0c84a9…

MALICIOUS

PDF

95.8 KB Created: 2021-07-19 20:16:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: c9215a5463ce633f22b121c007b4d5e1 SHA-1: 301dc417801db64f068bf63260b088faecdbedb4 SHA-256: 1b0ecbe30c0c84a9c7d10fb4d260264393d4a2f061b3356b24e83aca8155bace
172 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of embedded JavaScript and numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggests it's designed to deliver a second-stage payload. The 'SE_INVOICE_LURE' heuristic further supports the conclusion that the document's purpose is to trick the user into downloading malware, likely by masquerading as a payment or invoice document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://canvangdientu.com/images/file/xotefagi.pdf In PDF document text
    • http://alacarte-design.de/userfiles/file/tebimoxorurema.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/pabijeselokozapumu.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160a634f87c913---82841714041.pdfIn PDF document text
    • http://all-pass.com/folder/editor/file/44379236606.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/45b6ca39ba3f5452e124974b71bc8b69/27258474489.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/ab796abbc928b41baa0abd96ac18aaad/29218589488.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb3ae4d94f---xejakukenad.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/69fb54d67c4cc75cfe54d53d228d25b2/sowerilifozuwowin.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/e1a3f84931462322bdbf89672aaf65b6/zububu.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/e367ccf398e5d9720076c406d594a8f7/3698335847.pdfIn PDF document text
    • http://optikametuje.cz/userfiles/file/86888944234.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/86ea8e803ecc1228f68aee2f20ddbb8d/97906897825.pdfIn PDF document text
    • http://kancelaria-perfect.pl/app/webroot/media/files/8752641001.pdfIn PDF document text
    • http://chinasoftcore.com/userfiles/file///narafuka.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/88975496491.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/ceab842cfcfd7957db4888394e615c48/80190888798.pdfIn PDF document text
    • https://imad0c0.com/js/ckfinder/userfiles/files/71027499829.pdfIn PDF document text
    • http://txextremecarts.com/userfiles/file/xerijigopadeputegejirozar.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160870d1aee170---sasikasojemepodixipuvil.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/269160cd14799830427dc5d8bc0569d0/29409059479.pdfIn PDF document text
    • https://fontaine-eva.fr/userfiles/files/29128752030.pdfIn PDF document text
    • http://bjallstar.com/upload/file/febumifuduv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=sole+and+separate+property+agreement+formPDF link annotation
    • https://www.rt9.rspo.org/ckfinder/userfiles/files/xuvuvekoko.pdfIn PDF document text
    • 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_off0001121c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1121C 10936 bytes
SHA-256: c30a351051e317915f2e28517401f96f69bd32e23049a90973a1697df9598727
font_01_sfnt_off00012b49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B49 17104 bytes
SHA-256: 76d189a3fd18dfeeffd282150afbcc773365a78d977d98c45e521070048fb131
font_02_sfnt_off000157e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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