Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce5fd5174ace80e7…

MALICIOUS

PDF

85.8 KB Created: 2021-08-15 23:21:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 54add6be6368073e5125544126153303 SHA-1: 8034b9ce4da68d2b0c5e02b8afaf9ea16851d63a SHA-256: ce5fd5174ace80e7bd7ea4fd67b8ad6bd2184ad72d1ee74e3a5a113ebe91ef97
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://planet-for-events.de/userfiles/file/getejaperazarugewoj.pdf In PDF document text
    • https://hfdjet.com/wp-content/plugins/super-forms/uploads/php/files/0b0e11bccabff01a403c9d8ae05bf0f7/fivosajadofefopewenu.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/rewatafar.pdfIn PDF document text
    • http://archi1919.com/smlclub-files/file/32711276383.pdfIn PDF document text
    • http://staropolski.net/Upload/file/34521496436.pdfIn PDF document text
    • https://kmkmekanik.com/upload/ckfinder/files/19832170249.pdfIn PDF document text
    • https://wasael.com/userfiles/file/babepodalaf.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/78d1f737322e4c7019f0621e2ab8725b/dabufanedamasa.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/dd0bde0e63029ec3bbf1eac1643d5dbf/zijazig.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608345fb792a5---gediwisexirowubevoz.pdfIn PDF document text
    • https://jambukuning.com/contents//files/93355469185.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/3892c031bf16fda2dbc04c239b59131e/89416538018.pdfIn PDF document text
    • http://drivingschool-brno.eu/files/benituzugima.pdfIn PDF document text
    • https://101doctor.com/uploads/ckfiles/files/60cb93b82d7a9.pdfIn PDF document text
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/57784463799.pdfIn PDF document text
    • https://bishopsalamatkhokhar.org/userfiles/file/mutel.pdfIn PDF document text
    • http://cloverpark1959.com/clients/51168/File/92372306718.pdfIn PDF document text
    • http://jucal.es/images/file/puvufepatumigevuximu.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611109b2b4b99---69350486231.pdfIn PDF document text
    • http://quangphong.vn/uploads/image/files/41429158934.pdfIn PDF document text
    • https://shriayurvednagpur.org/public/ckfinder/userfiles/files/binibonogixikepakerodoxa.pdfIn PDF document text
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210815052835.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/titmm319lagmiodo12t1rbh5r1/tekilozuvezoxadirukixab.pdfIn PDF document text
    • http://rymwid-training.com/userfiles/file/7559372777.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=el+marques+de+sade+justine+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE64 17416 bytes
SHA-256: 488daf3aaec8ee75e200278f204cba44fe4e1019159b4b15c15394685b7c2996
font_01_sfnt_off00010a8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8D 3244 bytes
SHA-256: 39af874a3c928576525e4da39669a299904c4e07eef6fac64180b62fe76daaef
font_02_sfnt_off0001179b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1179B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00012fb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FB2 10900 bytes
SHA-256: 9edf087284da2a7053765a8550282c54a0dc1f3b8d477ef0227938458e72d05e

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