Malicious PDF — malware analysis report

Static analysis result for SHA-256 089258a16e3329a7…

MALICIOUS

PDF

90.8 KB Created: 2021-06-25 17:53:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 455d895a3a87e14121817c858a0a0212 SHA-1: 120ee6a9b079b5bc7ae9d64c1f50074999e9eee3 SHA-256: 089258a16e3329a72be94f68da18ac813b149478aea4b59a4e76bfb987c55354
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The file functions as a link farm, containing numerous URLs pointing to potentially compromised WordPress upload directories, suggesting an attempt to redirect users to malicious content or phishing sites. The presence of external URIs and link farm characteristics indicates a likely spearphishing attachment delivery vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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 https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078ee5065651---tovudizopemira.pdf In PDF document text
    • https://picinterior.com/ckfinder/userfiles/files/kutelogifitewususiwu.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/1d94660219c9b037692433b63e541c1f/kawagemewusewinuzagagam.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/51950626887.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608671adae5f9---47387428490.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/4644691415.pdfIn PDF document text
    • http://travelport.pl/userfiles//file/76695136140.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a31926a5e5e---malazuwimaverabemidaluli.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c42dbd7e820---22453793646.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aca7cc7a0a6---kewudizuleruxalupudaviv.pdfIn PDF document text
    • http://www.odnpoznan.pl/fotki/file/file/83482777054.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b84a4578b22---majoxapinubajivi.pdfIn PDF document text
    • http://asckhn.com/acskhn/userfiles/file/82351413380.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1f810da2b---23710591668.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/8d1efbe29bf0eef3dd170dfc5e27530e/gosujupopawaxeba.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/fde2c315f7eee55f039ff30fdf8508af/xixozokarazonedon.pdfIn PDF document text
    • http://fitnessklub-impuls.pl/uploads/assets/file/68887834131.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/00a89a41d1cd1e193fce9c2c913267a2/fojewenadaritaroj.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160c990b4df120---94783447393.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dfbb02b731---23608949563.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/bbotqa4e66pdhnussanbrpru19/34563109193.pdfIn PDF document text
    • http://shhs69reunions.com/clients/e/e9/e92da0bc0099326815942f81a5c18dfc/File/48975886744.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/ba6587ae79772be1bcae99655ef93f98/87822609327.pdfIn PDF document text
    • http://iburgisidimarsala.eu/userfiles/files/mowumamulimaburiwujikaref.pdfIn PDF document text
    • https://zionapostolicministries.org/uploads/file/repolibiwixulifivobixefa.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/b5195b1b17768f3bbef3fefbd533a429/kobuxoxiju.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/91ce59e3d09f0a38d463c53dad7033d5/pogirawonotugelakix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=three+components+of+the+health+care+finance+systemPDF 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_off0000ffa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000117bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117BB 17108 bytes
SHA-256: 2b6c04f7d6985a40d47079b76791335b7646aea1858120bdc4bbd7a346727de7
font_02_sfnt_off00014476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14476 10824 bytes
SHA-256: 1900170f8e6c72cb52b4cde577edfb7b573cb228ad7f6c65f51aa5598c7e042e

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