Malicious PDF — malware analysis report

Static analysis result for SHA-256 38a283dda79e0067…

MALICIOUS

PDF

106.9 KB Created: 2021-07-02 12:30:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7e4e1a2a816b73a3c95c51f0aa48d05c SHA-1: f6395d6f5ba24d04574418271f6d096f8dd04bcf SHA-256: 38a283dda79e0067e6759bb86b19e0fc32db07bfeda964dc266010f1e2dfe3eb
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1203 Exploitation for Client Execution

This PDF document exhibits multiple indicators of malicious activity, including ML classification, ClamAV detection, and heuristics related to link farms and social engineering. The 'SE_CLIPBOARD_COMMAND_LURE' and 'SE_CLICKFIX' heuristics indicate the document attempts to trick the user into executing commands, likely to download and run a secondary payload. The numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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
  • 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://krisoc.ru/uplcv?utm_term=distance+between+two+map+coordinates
    • http://samuiluxurytravel.com/Uploads/file/kifoziweboneridutanamo.pdf
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607463d677d4b---41155614059.pdf
    • https://zlatartopalovic.rs//files/56188421545.pdf
    • http://cuacuondaiphuc.com/upload/files/ramuwu.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160988a5fc5394---31274553018.pdf
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/c52e995b222a8383a365b4609c4f83c4/kasukam.pdf
    • http://drapa-technika.cz/UserFiles/File/feniguguzoxenadunulof.pdf
    • http://alphasigmaoverseas.com/userfiles/file/revumunefijunolotu.pdf
    • http://weberstellen.ch/userfiles/file/86065344063.pdf
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/ebero4onsgnokms821j6h7ocev/6001359780.pdf
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/35ed58c6ec4cc8014c92225f0dbcc578/7603962019.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/934b466ef5e1ac0a9b8948e8f6f1e973/xivexofem.pdf
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/1lnurfa9p378qb4r058ge1kth9/sunagokesoguzowa.pdf
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/lfeqt5oajkh75e5bsi8uqhfv0e/fufisapi.pdf
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/8u70i7hno70bsef4cfejujn8r8/zegar.pdf
    • http://alpha-cp.com/userfiles/file/ganav.pdf
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd80ea53cab---39453156303.pdf
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/7d381c4e4c3db739f65ca8ef515d09ae/nufibinuzunovavawosilo.pdf
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160a6bbff849d1---gixavadinusafo.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/80057db770f08f6b3159dd85ef7a9752/59848531242.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001215a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1215A 16792 bytes
font_01_sfnt_off0001396c.bin
a2c3406bd9956cccb8aeb39cc17ca27d6f0a73de4f28c449fbdb264087f8cb0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1396C 20620 bytes
font_02_sfnt_off00016fca.bin
dbd42e2ada824ac70940f969497962d2036c27db6003b439c7ece6f4da95a2d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16FCA 10856 bytes
font_03_sfnt_off000188b3.bin
9ea9197b6a75c7fe67a727ea228f5add925cef9a7182c4c37535d81b948c8910		 pdf-font-stream PDF embedded font (sfnt) at offset 0x188B3 16108 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.