Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e30280341cc6c9a…

MALICIOUS

PDF

85.5 KB Created: 2021-09-02 01:37:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 26e4e39250be2921b3e80e6db4b95b9a SHA-1: dc0f78b68a4cd2b64e45e5e3cf53c8841b16f222 SHA-256: 3e30280341cc6c9a96ad9b4a56d78fcd1e9d9d6579fa9ff98791f43b08178be2
196 Risk Score

Malware Insights

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

The sample is a PDF document flagged by ClamAV as a phishing trojan. Heuristics indicate it functions as a link farm hosted on compromised WordPress sites, potentially luring users to malicious content. The 'SE_CLICKFIX' heuristic specifically points to social engineering tactics designed to bypass macro restrictions by prompting direct command execution, suggesting the document's primary goal is to facilitate arbitrary code execution on the victim's machine.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1611647ce7e905---kitofimolujitazunike.pdf
    • https://hotelgaric.com/upload/datoteke/18411437918.pdf
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608db07993d02---tisamomon.pdf
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/cd660d38b40d0102e19e12f90cd350d1/tekokugiserofite.pdf
    • http://konyaozgunmobilya.com/userfiles/file/ludowatavawo.pdf
    • http://cy2hand.com/userfiles/89614045790.pdf
    • http://gokea.org/upload/editor/files/18449004140.pdf
    • http://showplus.ae/userfiles/files/52903533914.pdf
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160968f862eea1---kebap.pdf
    • http://www.thaiboat.net/image/upload/File/palako.pdf
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b987edbfe4f---11333630907.pdf
    • http://orlickachata.cz/files/files/werifekovev.pdf
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/cjb66q5eoenqpihs9ff4aj59gs/visubuwizinesorakenanozut.pdf
    • https://ludifrance.fr/userfiles/file/renimazijiwomefiludubujif.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160751e8f7a40f---27032559006.pdf
    • http://bbpcosmetics.com/admin/upFiles/2021-5/file/bukok.pdf
    • http://angelofthewinds.net/ckfinder/userfiles/files/zanusipu.pdf
    • http://agro-vostok.ru/userfiles/file/jaxora.pdf
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160f42442a51fa---26854133100.pdf
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/c5c68461c566b1e0104c6fd1fdd32ae1/xugakonudomelawimopivel.pdf
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607286af0c519---38650159616.pdf
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc3aafdb9cf---lewuj.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=connected+wifi+no+internet
    • 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_off0000ea4c.bin
733fc5e5fdc3bd79b0180141ab8bec9b6636e2d791534dabf6343583a50cef5f
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4C 10208 bytes
font_01_sfnt_off00010160.bin
05bcaa65176f3bc7373cef7fabab32420d41c697cf6a64c829a4a7ccd11cc421
pdf-font-stream PDF embedded font (sfnt) at offset 0x10160 17756 bytes
font_02_sfnt_off00012f65.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F65 16792 bytes