Malicious PDF — malware analysis report

Static analysis result for SHA-256 be78eeda9ee2bbb0…

MALICIOUS

PDF

88.3 KB Created: 2021-07-05 12:43:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b3c954a171b3f0aa91292d7e1dda9f13 SHA-1: 32d7d715649ee5777edad3981c1f86633e38acfc SHA-256: be78eeda9ee2bbb069b5b77927bf28ea53eb3e7e0057f3ae38361fe06d7136ac
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by multiple heuristics and an ML classifier. It contains a link farm pointing to compromised WordPress sites, suggesting it's used to distribute further malicious content or phish users. The presence of multiple external URIs and a link farm indicates an attempt to redirect the user to potentially harmful websites.

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/295095df398deb1c0f5b40f6689d536e/nokiwabebotetowuwitima.pdf
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce1b4c27d7---49773761602.pdf
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e3fe5a321f---18373015683.pdf
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dd646e4614d---fifemi.pdf
    • https://ckmusicdesign.nl/userfiles/file/purugexatazugusubusak.pdf
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c30c603e5b6---jebopejoravex.pdf
    • http://lubrifianti-auto.ro/files/file/3111551998.pdf
    • http://trendymamy.pl/userfiles/file/parixa.pdf
    • https://rosewoodcity.org/nbloom/fckuploads/file/miwivofisorekuro.pdf
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/f08eade915832ebb92839f8f9276091a/56186067956.pdf
    • https://invest.pl/userfiles/file/wefomujakexotavuwenukub.pdf
    • https://fobh.net/userfiles/files/lozewawokatiti.pdf
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c62a05780---nowef.pdf
    • http://ardechetendancebrut.fr/userfiles/ardechetendancebrut.fr/file/4091183154.pdf
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609839969582c---pufinup.pdf
    • http://cokhixnktientien.com/Images_upload/files/dateb.pdf
    • http://minhnguyenvn.com/uploads/userfiles/file/44787380677.pdf
    • http://kuehllawpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vilikekaniw.pdf
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/5d2fa0ec9003e5db8754fe444d72dc4b/wekipetaz.pdf
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1607960888f545---vufetewinudelokix.pdf
    • https://die-elke.de/cms/elke_page_files/file/18864091187.pdf
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/aa371b0bb15cb30c18ea7460cbb74399/nitoka.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bac627ca2db---xowufipilinafulewutijug.pdf
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/45d3e50059af8652c098f655d2e6410d/92016081306.pdf
    • http://carroll1975.com/clients/4/4e/4e2b018d07aaa5a30c3e4fca1c7a8df7/File/timobowun.pdf
    • https://nadinerogger.ch/userfiles/files/jijawogijapigulokuzo.pdf
    • http://romengo.com/ckfinder/userfiles/files/gurose.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=relieving+mail+to+boss
    • 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_off0000f55a.bin
97d5764c1b076a59ab247a4b2c8a072ff0959904b43b7f917b225d611a535c66		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF55A 17612 bytes
font_01_sfnt_off00012353.bin
c386688a0cc18eb3ed674aebdcb8bdf489f8018e1c0be2e8c1c11b47401b3bd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12353 10600 bytes
font_02_sfnt_off00013b93.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13B93 16792 bytes

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