Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ea70c7bea9ea988…

MALICIOUS

PDF

88.8 KB Created: 2021-07-08 11:57:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9270666e0f9ae07de8be1fffd63a554e SHA-1: b2d19ae876fa2a776dda7d21a84ca43ca647c6ed SHA-256: 3ea70c7bea9ea9884b5f28fdae6028b997f9d9c7065ee064d802aa97df00a73d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. Additionally, it features a link farm pointing to compromised WordPress upload directories, suggesting an attempt to host or redirect to malicious payloads. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160736f18eab4d---mewezexizabixofizibepepab.pdf
    • http://kwartetproforma.com/userfiles/file/manoxutabetefefud.pdf
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/0d12d4756795d3151729d79fad8994cd/kiluwomewazasovimibuv.pdf
    • https://angelsforwarriors.org/userfiles/files/52492062028.pdf
    • http://boilerservis.ru/uploads/files/58064130856.pdf
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/c4723e7276e9d4281d9476a1f0fe3dba/bikinurokasojuwutisa.pdf
    • https://cicadit.ro/UserFiles/file/1809748846.pdf
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/042c7a042d9af41c755394598f249e15/xunarimasalujokekew.pdf
    • http://lukasikgroup.pl/Image/files/mujulelojasovolufe.pdf
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/958daf289dc849e04b167592e59a4849/22489347130.pdf
    • https://marblobaths.com/app/webroot/img/files/niwesuzufivuvetiputeviw.pdf
    • http://fontanarosaserigrafia.it/userfiles/file/19428189684.pdf
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/520d385604905fcfc6a214b2612aabc8/92696927324.pdf
    • http://www.tobywells.org/media/fckdir/file/jubigorowozofab.pdf
    • https://tsafar.ir/basefile/tsafarir/files/bufogosamawujuv.pdf
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac678007294---vadidisaf.pdf
    • http://appinaris.net/ckfinder/userfiles/publics/files/wasoragenodob.pdf
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160cc5e5946790---70389110305.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/43d04aa915b22dc8d7edd2afe1dba7d2/gobofav.pdf
    • http://booklandbooks.com/userfiles/file/92534662345.pdf
    • http://ameshamagazine.com/js/upload/files/25554642108.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160886fc810bd1---13820760888.pdf
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ac8823dbf7b---nurakowudewewefebadopepum.pdf
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3ffcaad9bf---togoxixapozopuzeraz.pdf
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/febf5683d6fe67f98d0c40506c5ccad2/zonomorawenatawotava.pdf
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f2fa8ae5c---52062962868.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=what+does+the+eighth+amendment+prohibit
    • 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_off0000f9ea.bin
4bb0851c8ae6881f69e87785ed6bc90ebe9912384e6c1e0abcb289b2bfa66bdf
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EA 16640 bytes
font_01_sfnt_off00012523.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12523 16792 bytes
font_02_sfnt_off00013d3a.bin
c36f9473abb695e81a2355346871ab8f4bf3dbad6f7878dcc1eb4b3a0478f157
pdf-font-stream PDF embedded font (sfnt) at offset 0x13D3A 10924 bytes