Malicious PDF — malware analysis report

Static analysis result for SHA-256 e80dcc20d14bb525…

MALICIOUS

PDF

83.2 KB Created: 2021-09-07 04:30:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 93e6371a8143eebac60de48ff42a79c5 SHA-1: 86a0b96c4858c5e5185d8b1260e0baa045bb9f1f SHA-256: e80dcc20d14bb525035062439282a89b2ccfcea5b2eb3fca57e27c9fa6893e3c
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a phishing or malware distribution scheme. The presence of 'cmdpd0pmjapaue92/5463076266.pdf' in the document text is a strong indicator of a command execution attempt, likely to download and execute a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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.
  • 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://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/0v5d58ragucmdpd0pmjapaue92/5463076266.pdf In PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6bd01ac44a---76977021903.pdfIn PDF document text
    • http://teleinwestor.com/userfiles/file/48773804476.pdfIn macro / runtime command snippet
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/f420e9a7d7dab657beb0b60968c73890/86938012582.pdfIn PDF document text
    • http://weilandensemble.nl/ckfinder/userfiles/files/pivosudo.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/40d34f56002f330fd99c04857cf10a86/31255347459.pdfIn PDF document text
    • http://dogable.de/userfiles/file/5352177441.pdfIn PDF document text
    • https://nasikampung.info/contents//files/wugenajeretolisopa.pdfIn PDF document text
    • http://thecargonepal.com/userfiles/file/53079799092.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608a2892c9142---35431629896.pdfIn PDF document text
    • http://batterseataxi.com/survey/userfiles/files/beretigomulonarirovigiko.pdfIn PDF document text
    • https://goodluckfishing.com/ckfinder/userfiles/files/sejazaretogolame.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160828f5e1129f---7727261037.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c258138d9a8---jefopurijixelag.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/hnaem7c9mvlh6sjb6igklg0a53/20280514838.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1612f6188b177f---13209028626.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076e4b17dc39---zedilikujurotolasat.pdfIn PDF document text
    • http://massimomoroni.it/userfiles/files/7889939236.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/43hpvkkbvmgftmqqd7hnvnevju/josubugumebutuvakawe.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7b8b28b808---rumiboxukivebabakij.pdfIn PDF document text
    • https://gretajensen.com/ckfinder/userfiles/files/22471368197.pdfIn PDF document text
    • https://anakmeong.com/contents//files/foradopufuwanijogewuw.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/s65r7gr1sv15k398kkplpr35jg/zeweluzibisevonolalinozuf.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/9d3ab53e644d5acd9b250e66d13d92f8/satesenofevusaxafeto.pdfIn PDF document text
    • https://nationalcardsolutionIn macro / runtime command snippet
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=exhibition+catalogue+pdfPDF link annotation
    • 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_off0000df4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF4D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f75f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF75F 17868 bytes
SHA-256: c14ceec4e8bad50fcc66cf11ebd55ea01d45b543edd3850ca0430ef936f87eb0
font_02_sfnt_off0001260c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1260C 10956 bytes
SHA-256: 972406d4215f1789064be8670e9f45b49b31f7e644b57041eac4e6e59366794c

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