Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ed7c31de1b967c2…

MALICIOUS

PDF

84.2 KB Created: 2021-06-26 02:54:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6658d2a86bc8ab5be4c2f1762f4e9a3e SHA-1: 758fb2f084f88fd23836c7017c4a6104bf45c697 SHA-256: 5ed7c31de1b967c2d0b1b653ba7eb4cc14fc7a3b4b1e8f54ff07accf679f9f9a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS uploads or disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • 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.
  • 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 http://jevades.com/aircraft/fckimages/file/3331531260.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/f77d6fcc05e2eacc362169f8cdc880e1/xonegewejop.pdf
    • http://anhuicrew.com/upload_fck/file/2021-5-17/20210517002233238108.pdf
    • http://ferrogep99.hu/static/media/file/xorisapusixidu.pdf
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/e524db1dead2ae8dba623c9ba1eaa045/95446555934.pdf
    • http://kperrylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bejaxodefelamisad.pdf
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608133dec75b1---sulifil.pdf
    • http://kirakuramenandsushi.com/uploads/files/gefuziregajupenesidojolo.pdf
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/f5c1ed19f7ad6147473b8d979c61fc72/lilatetafunopobimaveliju.pdf
    • https://jambukuning.com/contents//files/33335689028.pdf
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607741fe3b3c7---sagosefepulalufirafasomig.pdf
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7d975e042---1301160375.pdf
    • https://facades-et-traditions.com/actualites/file/rorusasirore.pdf
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/61705957927.pdf
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a90b869db9b---27612067800.pdf
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/34958595503.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/13588648631.pdf
    • http://beiks.info/public/file/lulomale.pdf
    • http://marketherballize.com/ckfinder/userfiles/files/mivuguxeradufazofog.pdf
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/oh6op9qpaomiu48mhbrdmb2581/74299246539.pdf
    • http://etabetasurvey.com/userfiles/files/81619800871.pdf
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/a233ea7df86c8baf99ffa976de7896e5/bemigosuxawadakuk.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/abb7147447381493816d61217af9825d/belif.pdf
    • https://arte-salon.ru/upload_picture/23299438382.pdf
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/3327133957629ab03625b228c7446d6f/mugawodemukekasek.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=indiana+state+board+of+accounts+manual
    • 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_off0000e70a.bin
98cd8b06a8ff851f97a1ae5ae4ceaf2c0be325b59c9e7be01a2fb944d3608d1e
pdf-font-stream PDF embedded font (sfnt) at offset 0xE70A 16636 bytes
font_01_sfnt_off00011259.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11259 16792 bytes
font_02_sfnt_off00012a70.bin
1eb4d7c6790cdc4c794c1a00b3c561d22db6d55a371f7fd560550ff3f178b43e
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A70 10828 bytes