Malicious PDF — malware analysis report

Static analysis result for SHA-256 048763d710170438…

MALICIOUS

PDF

104.4 KB Created: 2021-06-30 17:46:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 9e55b8c8a9530206886c5ad48f37d4be SHA-1: 49285437285626c674c58b5b724ba3c85905eb05 SHA-256: 048763d710170438724041be012a39f8f6fdd2fe1f954b4c8857edb8325ef175
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as a link farm, with many URLs pointing to compromised CMS upload directories and disposable hosting. The ML classifier and ClamAV also identified it as malicious, specifically a phishing trojan. While no scripts were explicitly extracted, the nature of the PDF and its embedded URLs suggest it is designed to redirect users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://smidgel.ru/uplcv?utm_term=psych+opening+song PDF link annotation
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/18d44cf86d5b6acd1dfd0e7cdcf180bd/vuravilo.pdfIn PDF document text
    • http://thehonourride.ca/clients/c/c2/c2a221447f3e921143a55eca482c8289/File/13743767316.pdfIn PDF document text
    • http://perles-del-beya.com/userfiles/file/37701944625.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/duparunapox.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/daj0gro7ejsul0csp0tt25f58t/fijemuzu.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160d6d80b32c09---17914389367.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/9d8ed7526715f2adb86cd3da0b451cb6/51240771063.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071194187cee---2407583599.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/lpk3336ofpg3ingbkaf8r67sp7/21494389097.pdfIn PDF document text
    • https://www.alapan.org/fckimages/file/58562487882.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/6855004fd29e865dc55c3adfe85f0744/12981502864.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/xivefifa.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/kanikotupefitusifuwifibaf.pdfIn PDF document text
    • http://heibldr.hu/FCKfeltoltott/file/kusemitanebulowubelevavur.pdfIn PDF document text
    • http://k-yoga.org/file_upload/spaw_upload/file/20210504071946.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/pvcq79ljjlii40m5qk8hkp8cq0/depewiraropimivisir.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/1b7c44f1c8d0f4b805d42e2ff2f72418/kidova.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/809147cee5c4b1a86652248e6527182e/4497255651.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/klftge33qljd5dmkftcm88skq2/jovulalepovegesaxojujugin.pdfIn PDF document text
    • http://kimyasaldubeller.com/upload/ckfinder/files/10022553406.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/cec9c14735f8550dd613e12ea0ddacba/redetodixuvitum.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/3632im34t3epq5v3cb89ma0ttb/senawafakobunev.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/ghbhn1jau4o5j71kfn2et61o69/kawiworir.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/144f5cdc09b5cda808fd575fc01f6cc1/xiwowomuworegakajiwo.pdfIn PDF document text
    • 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_off00013511.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13511 10360 bytes
SHA-256: f444ae93cd76970e49eb8870dc621b5cb650be4f13e3a89805b704958ce1e334
font_01_sfnt_off00014c6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C6F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16481 18240 bytes
SHA-256: ce2204f12974ffd3373d8add17f0bbd5b8e1c7e5e30f10dd6dfdbf867d2c5357

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