Malicious PDF — malware analysis report

Static analysis result for SHA-256 5daed0529894d3cb…

MALICIOUS

PDF

81.9 KB Created: 2021-09-05 14:00:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: afdacb04a0d81986a9c745c0352946b9 SHA-1: 9d77dd3f6163c7eaf4ce12ad2b61a25eb6d7b203 SHA-256: 5daed0529894d3cb6dfd3db6b6397f53a0d34b890f609fa853b17e46443b9976
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to compromised websites or disposable hosting, indicating a link farm designed to lure users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://mousike.it/img_ins/files/70437748190.pdf In PDF document text
    • http://tatnhapkhau.com/ckfinder/userfiles/files/razewapagubapodapogorumej.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b33c536a7---51544935573.pdfIn PDF document text
    • http://bukharaalpharetta.com/sites/default/files/file/berugamuveso.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/3dca374b8e65fdc1e021fc0ab2946a28/zujij.pdfIn PDF document text
    • https://securityguardsupply.org/php/uploads/file/17827089938.pdfIn PDF document text
    • https://songhongresort.com/img/files/dalobaxafeme.pdfIn PDF document text
    • https://nguyenthelong.net/userfiles/files/47775436097.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/486cb6f2fe9ff37b544fcebd345299b1/13290706908.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/kadijo.pdfIn PDF document text
    • http://kiemdinhcan.com/Images_upload/files/77120738976.pdfIn PDF document text
    • http://cphs1970.net/clients/877309/File/27975267529.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc09934c62---36712285978.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c616c4b3f63---40466705983.pdfIn PDF document text
    • http://sxcec.org/userfiles/file/rododuzewusebavezifodi.pdfIn PDF document text
    • http://skikk.eu/app/webroot/files/userfiles/files/posorapivupevefelesavu.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16085e3611a7c0---29702682713.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/7e916oe3rq93h30s7msgb6fe0e/3065695759.pdfIn PDF document text
    • https://heks-tech.com/app/webroot/userfiles/files/14732031567.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/052949a1a48ac48f735f2f7d0b0608a4/81030063290.pdfIn PDF document text
    • https://fenixfalt.com/userfiles/file/geziwidajovunabegobox.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/c5038cdcdbe2a83a2c44fa6112f90b9d/vegekut.pdfIn PDF document text
    • https://cabsfromheathrow.com/userfiles/file/xirek.pdfIn PDF document text
    • https://stratasphere.online/userfiles/file/kavamelur.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=el+mundo+alucinante+reinaldo+arenas+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_off0000d862.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD862 18864 bytes
SHA-256: 4b4f818fdf439ddd51f711e18a8b497544ba3c87758916a77d6e807abcd37145
font_01_sfnt_off00010853.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10853 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001206a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1206A 10864 bytes
SHA-256: d1948114496116e4d7b0802456a5e0a692017f3d78b4b30da936b475d6823a7b

Open this report in the interactive analyzer, or submit your own file for analysis.