Malicious PDF — malware analysis report

Static analysis result for SHA-256 070213026f382e5a…

MALICIOUS

PDF

72.7 KB Created: 2021-09-03 16:22:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c06b08bbf056b27cdff0ddd47980c33e SHA-1: 9acd59cc7ae5015b9c22ca856c9af078465f8b31 SHA-256: 070213026f382e5a4b6b46cd208fcad90a8e735dd8d4acb82d61d297aa13e0dd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that point to compromised WordPress sites and disposable hosting, indicating a link farm designed for malicious redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a common malicious PDF distribution method.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://inwebjor.ru/uplcv?utm_term=helping+verbs+worksheets PDF link annotation
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a455cf012cf---nagamowofugavosi.pdfIn PDF document text
    • http://kalikraft.com/images/file/midojevuromadekub.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/dbb88f5a1f4c49b0565066fed25c0546/xatibexesamekotetapulu.pdfIn PDF document text
    • https://gotamsui.com/ck_imgs/files/22043352290.pdfIn PDF document text
    • https://autotronics.vn/userfiles/file/sexezanobomazero.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/rafowatefobuk.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/47391170266.pdfIn PDF document text
    • http://dajuicebarus.com/uploads/files/57771886529.pdfIn PDF document text
    • https://netwindowvn.com/uploads/userfiles/file/finunelotunesurobuk.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/2ae451f934a90e1a60b049dc3aa58d2b/55084593824.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093d52e4bcf6---sutamuliwubozerepux.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b44bd270b36---gonijetopefezogekame.pdfIn PDF document text
    • http://eprdel.cz/userfiles/file/kezajarizesigizusananu.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/xarerunedi.pdfIn PDF document text
    • http://aps-mes.com/files/file/kekafuw.pdfIn PDF document text
    • https://educhina.mn/editor/files/61404778238.pdfIn PDF document text
    • http://monticellotownship.org/userfiles/file/19949427937.pdfIn PDF document text
    • http://pro-group.ru/userfiles/file/jixemosijapamedij.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/7441nn6qfrrooubm6qda6b9cl4/12124913835.pdfIn PDF document text
    • http://randygordonlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tiwelebagupabamuzefilup.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b888f7aba80---lubufujigudariwusadafu.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ee474e269---xalofexegemodigerugi.pdfIn PDF document text
    • 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_off0000bc36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC36 16040 bytes
SHA-256: fbf7c2c7a203dd6757b2b597f4444061b418cfa44a02927ced1edfb4a13b7997
font_01_sfnt_off0000e4f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F8 10744 bytes
SHA-256: b80814eb7055bbf39485f7bdd897e153cd42b396f97aab2aad121a2f9728825d
font_02_sfnt_off0000fd61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD61 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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