Malicious PDF — malware analysis report

Static analysis result for SHA-256 e75e6e2bbad1a51f…

MALICIOUS

PDF

80.3 KB Created: 2021-09-06 04:19:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 825797b54393048c2ba0fd1c236abe19 SHA-1: 8da8aae529fa12b10a99efefabe79d9b68f16722 SHA-256: e75e6e2bbad1a51f392f1c6d9a46f93b57378e39af807b78bf2531bc7b4fb2be
156 Risk Score

Malware Insights

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

The file was detected as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of external URIs and link farms points towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160b0b6ec77491---rigaferusirulivinasuxutus.pdf In PDF document text
    • https://atl-50.com/files/file/zufikunavavisix.pdfIn PDF document text
    • https://growyourmoney.in/userfiles/files/somivakadobudedaduri.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/97841f25ac75e68d88fd526c104f08d5/togixupavemelebek.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/rigazateredakosoposafiz.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/8fa3d3927dceb2dfa54ebf19c2ded692/kadopakunil.pdfIn PDF document text
    • http://pomocnaukowa.net/Upload/file/81433535911.pdfIn PDF document text
    • http://apcmagon.com/userfiles/gixovatadifomidot.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/8pfn83iem1sg3350gsckvth2ld/78367541720.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1611d97be3719c---sakipageluxulubixakidas.pdfIn PDF document text
    • https://trouver-une-ssii.com/img/pics/files/dukirex.pdfIn PDF document text
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/58d87be417b36c6f400677d9cad47eef/vavamovexugoxujol.pdfIn PDF document text
    • https://veljun-ldm.hr/files/zikoj.pdfIn PDF document text
    • http://risorsaterra.it/userfiles/files/86323394936.pdfIn PDF document text
    • http://paulbwatkinslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wadezularometilevutegale.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1612bdf0d9b731---8712801832.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/p5e5vsnvjd5g21f4rqhgcrqivu/84471063008.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f11513faa---17105489559.pdfIn PDF document text
    • http://shengyaweb.com/uploadfile/file/2021072002105157.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/b9849f6fe393e475ce218135e8655360/61303482647.pdfIn PDF document text
    • http://businessvaluationapp.com//fck_files/file/1684190545.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=spring+framework+in+java+for+beginners+pdfPDF 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_off0000d5a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A8 11288 bytes
SHA-256: 7991c894cf52c8e71563b5bb4d100ab5d6c5c40f2da1b342586bf9b5ab7df366
font_01_sfnt_off0000efbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000107cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107CD 16920 bytes
SHA-256: 553fd8cd09439de6143b08ef267e217faac8c25281d0dac53a2941f27f7bc228

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