Malicious PDF — malware analysis report

Static analysis result for SHA-256 97ad1cd6dfb028b8…

MALICIOUS

PDF

85.4 KB Created: 2021-06-28 15:00:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f7284da696a15bd48bd09b5cb6eec738 SHA-1: e21424959a765877d639a9d8a528145d5895cbaa SHA-256: 97ad1cd6dfb028b8ce578c2520cfbff8889bb864a0341e53cd862eac333968c8
156 Risk Score

Malware Insights

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

The PDF contains a large number of links pointing to websites hosted on compromised CMS platforms, indicating a link farm designed to distribute malicious content or phish users. ClamAV detected this file as 'Pdf.Phishing.Trojan', and ML classifiers also flagged it as malicious. The presence of numerous links on potentially compromised or disposable hosting reinforces the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c538864ae2b---papipuzaz.pdf In PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/ou4hkeadhk0frfv832vjpf7un7/fegagakepiwetet.pdfIn PDF document text
    • http://pathtojanna.com/userfiles/files/jivetewotinisij.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/i3u6lmlsinp5o9vlpbqvnrnh3g/fubusukakazupaxemodeka.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160c100b9b2aad---serirusovi.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608443b3a1f5f---godasovovujolusuxuja.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160aa4fbc96afd---nisad.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160906fd345dba---rodexapatokilajapisuwo.pdfIn PDF document text
    • http://tscyw.net/userfiles/file/20210626170147_awx8hj.pdfIn PDF document text
    • http://manhchenang.vn/webroot/img/files/bawujamujopapegurudojir.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/udb1c9a9n69dudt6ge0f3p5n56/58445050460.pdfIn PDF document text
    • http://mdsalon.ru/img/lib/file/barob.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/5d24fe5745e2d10bfa3c59fe104cd8b6/24530112723.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/01152bc1755ce89dd92d9a71dc1b0dae/guzelulugexukodaviduvim.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/ch8e9k52b8k37hpakdp56t1d9l/22162251692.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/1o8bnhlm11gaj524qd0qmt5om0/nonube.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160afde630f8aa---duwege.pdfIn PDF document text
    • https://33mobility.net/uploads/files/radanexunogaxewaj.pdfIn PDF document text
    • https://trunglamdecor.com/uploads/userfiles/file/tapesuzareresiluwexujejoj.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160879cf99a834---kuziwal.pdfIn PDF document text
    • https://europartner2.pl/uploads/bezububozebilu.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/dbde8c469b2a6f4dc28d6cb5e09bcbc0/xanijolufexewevegadimi.pdfIn PDF document text
    • http://wedding-ideas.ru/ckfinder/userfiles/files/sudevejidetipukanugased.pdfIn PDF document text
    • http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606caa1038bed---wutexutumexuvatuxed.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e505acdb58---dedizowekesupaxasegi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=1+octave+scalePDF 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_off0000eef9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001070b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1070B 16732 bytes
SHA-256: 6cef38b965a4f04b124505891d3e33c341c337568e7fe334eb3a63444d846510
font_02_sfnt_off0001327d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1327D 9948 bytes
SHA-256: 3825fe46ccfa35417c73104784235b2b7cbdad7465345a66738b7548a1998ac2