Malicious PDF — malware analysis report

Static analysis result for SHA-256 48cd4c6b767f1dc7…

MALICIOUS

PDF

88.0 KB Created: 2021-07-02 06:47:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: a5dd848a4f4eb5d4423f359d4596a923 SHA-1: 26005bdd756fa7fb3f24eeddd1aeabe7e5174bf5 SHA-256: 48cd4c6b767f1dc78053266388058f001a60375b205bddcbb17e843f7af64e35
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links, many pointing to compromised WordPress sites, designed to act as a link farm. The primary purpose appears to be directing users to download further malicious content, likely other PDFs or executables, from these compromised hosts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://oniceh.ru/uplcv?utm_term=south+leo+relocation PDF link annotation
    • http://0-50.ru/userfiles/file/87317358797.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/37d72c2a73f5ef8829b856b11da24d05/digaliwipirozovojubatu.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/fedowotazox.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3fb94e325---nefutenasu.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/7c446ebb5c0ca8799517a89045408186/27914184140.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/gu6p2m1513s2s8l4u5v5svick2/suxoba.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160c09b21a45a1---leworewexutev.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c76d947fe14---61356937316.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/37392b203ea4f42f12a7dcbb7818fc39/49979608519.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ae42788983b---wakiwidipiz.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1607b04f4249ce---denobakobuzarozedo.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/t3f27dkljiqj7d4feuf67d0q45/83518270716.pdfIn PDF document text
    • http://eyupsifalibitkiler.com/resimler/files/texuzanuposijibamivu.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/e9e5422be179750250760d5faf656e02/visesuxexolagem.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4a9469ed24---kenovasojes.pdfIn PDF document text
    • http://yournamebadges.com/withyourdog/cms_uploads/file/21264349015.pdfIn PDF document text
    • https://dineflon.com//files/vugonitoxakoj.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/i09ausa6dlf11n88pqn4cl9t20/xoxokowarupo.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160badcdf6fd96---wugajapudararisagi.pdfIn PDF document text
    • http://al-farh-iq.com/upload/userfiles/file/golufarig.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/58604117789.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba13e71e4ad---jivunugafipenerizofo.pdfIn PDF document text
    • http://rolfingnaples.com/clients/a/a5/a5422f62036d2d393d866963e902351c/File/83791302614.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF570 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010d82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D82 17032 bytes
SHA-256: 0ac05ce7496fd98aedbf5790e860c5bf3b90a0aadbdc325dbac6e38e274087cb
font_02_sfnt_off00013a14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A14 10336 bytes
SHA-256: a3a0b4948bcd73e1f2821f77cbd70a34ad33cbe82578390df94f9ca1ec47fe53

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