Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c012291c50171ab…

MALICIOUS

PDF

75.7 KB Created: 2021-06-25 23:27:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d7c1c4cfc648c8b2ad38cc5857884fab SHA-1: eb885e6ba432e4bf4f47e8914894c70c71e50136 SHA-256: 4c012291c50171ab7b878bb23d0220910a91c848e3d1858bb364e01f967cc1ee
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous external URIs and link farm patterns, suggesting it is designed to redirect users to potentially harmful websites. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://irlanc.ru/uplcv?utm_term=design+for+everyday+things+pdf PDF link annotation
    • https://aashianarealty.com/file/48341295802.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/wugobuwa.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/92902fa754021e69d6399d57f0427db5/mibomovim.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c6c6fc35b86---majuzewowafutulemegosu.pdfIn PDF document text
    • http://thomasbelldescendants.com/clients/40432/File/zosiwezekowurajabujebiwez.pdfIn PDF document text
    • http://mt-filtration.com/uploaded/file/81436888460d3711171f43.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/0f75538baae216047737915c418e2284/juwupibibiserotelu.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/d0ca96dca06e6984562365202ff6f758/63944702039.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/2272619a2f8fa70f0c2d59ae86311592/fomawikusisejeb.pdfIn PDF document text
    • http://wojno-stal.pl/pliki/file/zofaluwajosor.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/99326428501.pdfIn PDF document text
    • http://pogotowienaukowe.com/Upload/file/34033539432.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608dad9308b03---72726397604.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1cb4a019d6---xiredazuzatewazasizerab.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/31jipefqb9l55obhkqpcf0602d/fetarole.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087edf772604---35335296410.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099e2e249697---futodulomisofurepukibekil.pdfIn PDF document text
    • https://avenue102.com/uploads/file/91051485876.pdfIn PDF document text
    • http://daehwa.info/uploaded/file/50158063207.pdfIn PDF document text
    • http://emke.hu/uploads/ckfinder/userfiles/files/50694167013.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/23133478143.pdfIn PDF document text
    • http://balone.net/_upload/file///wegopowogajokenebuvari.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160757cb9cd3ef---topimupuz.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/18bb49e1a5623a890adb5f7589e26aa1/98181228092.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/274f4b499b493e8348288db06fe12047/80376074199.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a0a9713d8---31480413663.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_off0000c5a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5A9 16408 bytes
SHA-256: 63e9375cd802c7a11ada423b66b314277169203c03e2756fc5fba7c188faf487
font_01_sfnt_off0000f056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF056 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001086d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1086D 10912 bytes
SHA-256: a18d90aeb55ea2e17346510e534ef567cbcf33acd462cc573b6c40fd8263aa41

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