Malicious PDF — malware analysis report

Static analysis result for SHA-256 94757f5835333bcd…

MALICIOUS

PDF

91.2 KB Created: 2021-09-01 08:10:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: b2759ae8288ba9b66f26723c2664070c SHA-1: 5fb4673d2dd224153914eea99ff228051a29b0c3 SHA-256: 94757f5835333bcd297b0417611de3480649718e884aaa998ca4b7427003a9b8
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm or phishing lure. The PDF structure and embedded links are indicative of an attempt to redirect users to malicious content, potentially for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16093b6eb92f12---22520349716.pdf In PDF document text
    • https://listocrm.com/userfiles/files/nagibotajugovowe.pdfIn PDF document text
    • http://dashoernerboot.de/userfiles/66119978541.pdfIn PDF document text
    • https://kemxoi.vn/app/webroot/files/images/pages/files/42027965448.pdfIn PDF document text
    • http://youandisagenix.com/ckfinder/userfiles/files/pomukigitovejopizuk.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/16093353a33317---18955523809.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/9249473199073f1533ebd705602d6a02/66912821333.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160bad501dc0c2---zanikadozariwewe.pdfIn PDF document text
    • http://jar-ted.pl/file/77087937861.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a089be983a2---60846596084.pdfIn PDF document text
    • http://lovesushiscv.com/uploads/files/52868244252.pdfIn PDF document text
    • https://khabul.mn/mmpa/userfiles/files/42801256073.pdfIn PDF document text
    • https://vietfun.com.vn/wp-content/plugins/super-forms/uploads/php/files/c2vv0jn5kdad3ua0s73djoofee/sejoxidiwojuwesixosoxiwin.pdfIn PDF document text
    • https://airshow-bg.com/file/46362869140.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16076459e0460c---pubonikasibab.pdfIn PDF document text
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/78927186551.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/38414490674.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d4d6cc283b---36573356363.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/90620144772.pdfIn PDF document text
    • http://pc-driver.ru/userfiles/files/3219197516.pdfIn PDF document text
    • http://primethailand.com/ckfinder/userfiles/files/pisudumivek.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160767e46eaf91---72668686286.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/dad7605dc4fb383d5c792c985a662dd6/32620315363.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=fossil+fuels+renewable+or+nonrenewablePDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10063 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11875 17964 bytes
SHA-256: 27e75840c86605a21638161132ef7b47d34abac3b7c7490bf185c5ed53e9b0de
font_02_sfnt_off00014711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14711 10412 bytes
SHA-256: 9a81f845c1f06e97576b1a5687984d5ed0e663ff0a99fc5246ec39bc87b340e9

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