Malicious PDF — malware analysis report

Static analysis result for SHA-256 173517040cb89748…

MALICIOUS

PDF

93.7 KB Created: 2021-06-27 07:05:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 68f6475f152f1f3c936b1c9234564426 SHA-1: b02b0f12a44264c4f771f6fddf5d87d121ba96e9 SHA-256: 173517040cb89748cc54e5e36dc234498f56dfa6f46bf4e113e0f13c701ec860
196 Risk Score

Malware Insights

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

This PDF document was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. The 'SE_CLICKFIX' heuristic indicates the document attempts to trick the user into executing a command, likely to bypass macro restrictions and download a secondary payload. The numerous embedded URLs pointing to compromised CMS upload storage and disposable hosting further support a malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/0d0a9b26ae1c1f5b418ceb67c2d258eb/lilofibemokavanu.pdf
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c09103e50c---32680391026.pdf
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a57f24646e---fanasok.pdf
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/5iqhosa9csalfahdtaua6lv071/gurejusukoxenesipoze.pdf
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/4652e40adb1ab62644a380f79d9b83f1/30251365574.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bac043f2b9f---29620430810.pdf
    • https://gachbinhduong.com/upload/file/gagafedebajugoxutosez.pdf
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1567db1b4---temufinivifunap.pdf
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160807cc5883c6---revaxibazegupuvolefubu.pdf
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086f5eb7daf7---togivigoguve.pdf
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9505fa91cb---24696618066.pdf
    • https://arzhosting.com/calisma2/files/uploads/23018219044.pdf
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7ecb07cc7---rajukalojebaregova.pdf
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d6cf0668f---71421096567.pdf
    • http://marcelponjee.nl/ponjeefiles/file/pusimagerapijajozumijara.pdf
    • https://royal-art.pl/uploads/userfiles/files/vixopixawesajez.pdf
    • http://www.abcklima.hu//data/editorfile/xutuxobabemena.pdf
    • https://study4student.com/cache/fck_files/file/87103129423.pdf
    • http://praconsulgroup.ru/pict/file/44451923762.pdf
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606efa3601d2a---98450816411.pdf
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b09f333a1c---xelowozamafogakoke.pdf
    • http://vasvaripalmuzeum.hu/upload/file/7062826212.pdf
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/86aff1f308a533a527a59ca86fa3059e/26791100126.pdf
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d70947755---7339073044.pdf
    • https://maturana.cl/upload/file/ditaninuderejof.pdf
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cb23c2d1af---4497454305.pdf
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d39bf4ecba---nenijanateboxadutu.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=to+run+out+of+time
    • 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_off00010b4a.bin
ae44d6caffe46cfdee85d688ac64124504e8044e21bfa48b6ed6a07780729a1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B4A 17920 bytes
font_01_sfnt_off000139c2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x139C2 16792 bytes
font_02_sfnt_off000151d9.bin
a8924beb8dfead6213510bed03a4e2c0e2017fbb6a94b90e9a0ac47747203642		 pdf-font-stream PDF embedded font (sfnt) at offset 0x151D9 10064 bytes

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