Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea607ce872ac9e6b…

MALICIOUS

PDF

87.9 KB Created: 2021-07-18 15:34:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 71feb5ba020787e64ff212cddf53b5b7 SHA-1: fe00e625fe329ccd6336e1a54081c11119eb6169 SHA-256: ea607ce872ac9e6b98f35b9c4d25fbd066ae71adbf47b919ec0e42fa2871a6e6
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to numerous distinct hosts, many of which are likely compromised or disposable, suggesting an attempt to distribute malicious content or engage in SEO manipulation. The presence of multiple external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicate a focus on directing users to external, potentially harmful, websites.

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 http://446888.top/userfiles/file/37276335957.pdf In PDF document text
    • https://pui-vital.ro/msg_media/file/xigufutenopilefakok.pdfIn PDF document text
    • http://kidsjeodo.com/images/files/99671928212.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/2229fe15e1e04e53456678257d83babd/7132402899.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/k8ckdqa7eate17pc680vtejdn6/degajaxebutezibusebag.pdfIn PDF document text
    • http://jamesirvinewedding.com/clients/f/f9/f947a18657f5d77a8fcd192ffd4ccf25/File/vimexosinubotu.pdfIn PDF document text
    • https://veterinarycarefoundation.org/userfiles/file/mewowozomogegewe.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/vi6lnaumomecodh2l0a7u85381/sulume.pdfIn PDF document text
    • http://argol-editions.fr/userfiles/file/95161243362.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/59938384518.pdfIn PDF document text
    • http://autoscuolemontagna.it/userfiles/files/52877013923.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1608f7ffa1bf97---xebun.pdfIn PDF document text
    • http://win-sonic.com/kida2018/ck_imgs/files/rizunajibo.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082c9006165a---74095626185.pdfIn PDF document text
    • http://niestachow.pl/data/aktualnosci_imgs/file/27126364619.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087fb108435e---dajonimalemikuvafenileg.pdfIn PDF document text
    • http://nensi.si/upload/file/woxowareveworavujal.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c2fd5748546---lalanuretikumo.pdfIn PDF document text
    • http://english-life.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160769dd0eba27---3206707776.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/054091fd56af56e7130078f769ad455f/kuzerosesi.pdfIn PDF document text
    • http://asja-doll.ru/userfiles/file/fokojivilolukinodajuto.pdfIn PDF document text
    • http://aurora-c.jp/files/files/64752281504.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e4403a6f34---66893875300.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=hebrews+8+commentary+spurgeonPDF 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_off0000f0d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D1 11216 bytes
SHA-256: 4708bc676d998078d975aa85cc7908c1e5733715a9862c8a4fdc9f486bc953ca
font_01_sfnt_off00010b05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B05 17972 bytes
SHA-256: 23b7207c48a607e7d8625d8e058e33355d7254de04230f7f9ead6a25c3575add
font_02_sfnt_off00013a9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A9A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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