Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1e6662ac0246093…

MALICIOUS

PDF

89.3 KB Created: 2021-07-03 08:37:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8217e87e374787d73c38d05c1508b5be SHA-1: 3d71e10b2b32a94e1b14cd2be555e0d7cb62d701 SHA-256: d1e6662ac024609395bb78cfbfece17591eadc7e7f05923ef422355979048722
316 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File Execution: User Execution

This PDF document exhibits social engineering tactics, including lures for browser extension installation and explicit instructions to execute commands via the clipboard or terminal. The presence of multiple URLs pointing to compromised CMS uploads and link farms suggests an attempt to distribute malicious content or phish for credentials. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to download and execute a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 10

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/ed67fa45d54aac01abc177e0b28a25b2/kipazapibetelibameba.pdf
    • https://atvatextile.com/upload/ckfinder/files/63713639763.pdf
    • http://agrion.org/upload/fichier/ledimaxako.pdf
    • http://patrick-vallot.com/upload/files/20623655231.pdf
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b65677ddc8b---88858035853.pdf
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab642a1fca---zosezusepiw.pdf
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1606f89544e9be---88351722249.pdf
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/035f9b7baecdcceb60a86ab7fb003dac/70882977545.pdf
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae818c06e91---46147777557.pdf
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/0f9878408aae297762847104ebce26ef/womed.pdf
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16094b88360740---getatarikufeluzawutirokik.pdf
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abd7ec06be1---37852865949.pdf
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/22de5cadf97f82927cce90fb56940fd6/wukefedonowedusijes.pdf
    • http://educationexplosion.com/clients/a/aa/aae59ec6301d25964842a0067e0ae100/File/rularisigipoxeba.pdf
    • http://ferrogep99.hu/static/media/file/miwegojafapado.pdf
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/1b5a52cc7a1951cfd596d3c7902cc8f3/nexovopasagipu.pdf
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ba2c9d0d7b6---9097635512.pdf
    • http://geoplan.su/userfiles/file/95285984741.pdf
    • http://allamericannursing.com/userfiles/file/powudegirozivinonudew.pdf
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16092fbf5802f8---96414481317.pdf
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609c4cde8248d---letisesovuwamewunajedaf.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=all+cmd+hacking+commands+pdf
    • 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_off0000f6dc.bin
a0734fc1a23270ff5bee10022b684f248a35dc9b846468671e1cb6c13fa51bc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DC 17932 bytes
font_01_sfnt_off00012637.bin
99130fbb59369ba533e9c026fa31c8638e4f14ee77246727c4d465c1dd97b47f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12637 10808 bytes
font_02_sfnt_off00013eb9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13EB9 16792 bytes

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