Malicious PDF — malware analysis report

Static analysis result for SHA-256 d01b6c442ff0e210…

MALICIOUS

PDF

92.4 KB Created: 2021-08-02 08:44:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8c8914c55e422c6a2c037bc3021377a9 SHA-1: 30ea1f62bc20a8abca08999bfd9912aca41a82bc SHA-256: d01b6c442ff0e210e4e7ef0aabe80a348ec148281061627dd96664ea95dc6462
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to compromised WordPress upload storage and other potentially malicious sites. While no scripts were directly extracted, the nature of the link farm suggests it's designed to lead users to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609e6c3486b42---lufan.pdf In PDF document text
    • http://clearspace-design.com/CKEdit/upload/files/todirujemupunobonubat.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607abe03c26c7---rulopatusavikasaraxidut.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/31844255351.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160706a7dcd393---79599125908.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607d482a7525b---sigaxerudipasob.pdfIn PDF document text
    • https://talleresimad.com/images/subidas/files/21396513082.pdfIn PDF document text
    • http://studiophotosfashion.it/userfiles/files/paziwaximewikupadotoxaru.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/xixirowen.pdfIn PDF document text
    • http://bliksis.ru/userfiles/file/gozamokumaguxarurizaxijab.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/5e5907244160f5b10e83cbde1ede3fb1/nogiwesutenafizafi.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/8d6cc8f7bf3262ca216ed397d503cb70/zopem.pdfIn PDF document text
    • http://carneslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sibotizikepanef.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/dh0intk9lnqv0plahjppgrhiu3/71200575029.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081fc2b7c0a2---30585344141.pdfIn PDF document text
    • http://basaritarim.net/admin/editor_resim/file/53809919559.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/0b6be62a280f36cd818bc57912936692/fejevebuwosibobesat.pdfIn PDF document text
    • http://shosholoza.de/file/86239934745.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/67c15631430e4fbb349e04282d7d90f8/vanavodowo.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160762998e26ac---12825654534.pdfIn PDF document text
    • http://babywagen24.de/userfiles/file/4138592381.pdfIn PDF document text
    • http://ozkayalartrans.com/userfiles/file/ziwoneni.pdfIn PDF document text
    • http://mizuho-co.net/file/ck/files/bezolerutarumede.pdfIn PDF document text
    • http://www.gabrielamaciel.net/images/content/file/worulopatobowemob.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b4db3d8050a---38010027296.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=advantages+and+disadvantages+of+deductive+approach+in+researchPDF 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_off0001062b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011e42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E42 11000 bytes
SHA-256: 677870038eb4073082fa3faf58aa1eb524de093033ff5e247304183d6f77d910
font_02_sfnt_off000137a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137A2 16660 bytes
SHA-256: 59c9101b708ac0ec2d3dd5b423d17a3c410c9ee92f18cb641bfcd4a33adfe759