Malicious PDF — malware analysis report

Static analysis result for SHA-256 34edd0e72ddc1010…

MALICIOUS

PDF

81.2 KB Created: 2021-09-04 12:47:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2b30d47003dd685f35d070171ad2fb72 SHA-1: 9ebb0c898698a9d2a8efcb3b6fd4b82b9d3c77a6 SHA-256: 34edd0e72ddc1010b43a76981cd6a41c47126b0607f0770dfe1ea8238d1b86b0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external links, many of which point to potentially compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://badrivishal.com/media/24775419087.pdf In PDF document text
    • https://rintrans.com/files/45961546988.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/46096225019.pdfIn PDF document text
    • https://santchavarabed.in/ckfinder/userfiles/files/11948706755.pdfIn PDF document text
    • http://kartywspomnien.pl/uploads/assets/file/pazaridefaviluj.pdfIn PDF document text
    • https://condominiobrisasdelnorte.com/userfiles/file/zukifojorev.pdfIn PDF document text
    • http://boatmonies.com/uploads/files/pewemekupategujonogu.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160c8acdb52568---75976784742.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/92348116178.pdfIn PDF document text
    • http://apsencollege.org/test/fckeditor/file/sakasonuw.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/46g8ufrd01amgd77ucchtvq1eh/91749347567.pdfIn PDF document text
    • https://cevhertemizlik.com/userfiles/files/suxarekoturofadasil.pdfIn PDF document text
    • http://holidayinntorino.com/userfiles/files/32695647638.pdfIn PDF document text
    • http://ghibms.com/userfiles/files/lewigupedisagapiru.pdfIn PDF document text
    • http://gitishahjahanpur.org/ckfinder/userfiles/files/90506810162.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/apm9p5d9jhcg13o9tkj77u08ev/28545799466.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/p1enjgg64lklb8fatidr3vi6kl/joxozurevodimiwi.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160f7cc32dc82f---23389811069.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/ib2kug73k3mh2l0eab619gklr4/51217698099.pdfIn PDF document text
    • http://historia-bfured.hu/userfiles/file/33239545433.pdfIn PDF document text
    • https://www.retake.dk/ckfinder/userfiles/files/62161715835.pdfIn PDF document text
    • https://fruitssupplier.com/app/webroot/img/files/60524891755.pdfIn PDF document text
    • http://aquarium-kochi.com/app/webroot/ckfinder/userfiles/files/zabufigukovofewija.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/50370984886.pdfIn PDF document text
    • http://neurooperations.com/ckfinder/userfiles/files/31170096707.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=gerunds+after+prepositions+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_off0000d855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD855 17472 bytes
SHA-256: a385e0e66d1b9e02470ac7738ad419b72dbf7af06128d119dbee417f1705a2e3
font_01_sfnt_off0001063f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1063F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E56 10584 bytes
SHA-256: 1e490b7e4f93686490a18b840187937cd901362498495f757c8aad8905344a15