Malicious PDF — malware analysis report

Static analysis result for SHA-256 bea1423422cdd49a…

MALICIOUS

PDF

86.5 KB Created: 2021-06-28 11:22:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 061d63a6c7d890049f4bad2db7793c34 SHA-1: 406ed16c4771a97ae1d349cae289b695b54bd64b SHA-256: bea1423422cdd49a406c7388fd6268dc5c7b363155e522e2fc8a8e14e93d8bac
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, likely serving as a distribution point for malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document's structure suggests it's designed to lure users into clicking these links, potentially leading to further malware downloads or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077b7e39a244---54921804652.pdf In PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/53f5d7ab5613b9b67c15039265bec792/42045049801.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16099e59f743c3---41842592254.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/16076f263f0440---kegutuzizozakepamajop.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160874bb3edfd1---wofisesomup.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/3a9a1fce9a4c7b24b409465af336648a/47135172976.pdfIn PDF document text
    • http://sakuragiramenandsushi.com/uploads/files/nikemizakinala.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/ac2209fec24b3014b823d86c5d336830/5128310947.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/eskhfo30rfn06nc227j3mmlsa0/sejesijikarijodomat.pdfIn PDF document text
    • http://dtcguild.org/clients/80367/File/3388035782.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed573c51df---pobazodegevotutabowezer.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/7kal4vm1dvfrflolj6ifpvifi2/68776105847.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/rd8ad70gncoqi479fsj5c3vshs/kovuxegidiwu.pdfIn PDF document text
    • http://educationexplosion.com/clients/a/aa/aae59ec6301d25964842a0067e0ae100/File/28856604606.pdfIn PDF document text
    • https://bistakalikotenetwork.com/userfiles/file/zonudebuxinadinodatotafij.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e28a3a6d4c---vujotadebuzawukud.pdfIn PDF document text
    • https://monuments-msk.ru/wp-content/plugins/super-forms/uploads/php/files/d49527942620d493851f2c617fa64ca4/36738449928.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/a6c22eb8f6a9c5659413062517f8cbfc/velefozateser.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/df5a2e649817d0bbff0e1d3b5bca5b91/92903582588.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ec8ec2b32b---50120429490.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a22721af378---36441001459.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608f7b1e0c6d3---zikaxejokugolewotumovuxe.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/l3af7aj9t44akmk544m15gvnh1/tofijofa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=sharing+knowledge+with+othersPDF 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_off0000ef8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8D 17300 bytes
SHA-256: f5e8c6e95148ff2f61757e6728b289feca4523fb4c1b4afea1bf978da6f70286
font_01_sfnt_off00011c7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13491 10780 bytes
SHA-256: 50e72741c4eb589dfec2979eb0b8d2829d2bd98fc5a9559bbd2c1425cd6add7b

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