Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ecdb4069e1b8915…

MALICIOUS

PDF

84.7 KB Created: 2021-07-24 03:22:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0dbd70489b1be0c624015c1bff07d0fe SHA-1: af9237e346c11075fa55f7f33ca6c34cf93cbd10 SHA-256: 7ecdb4069e1b8915855075c6a2f4761d7010525b9601f050eae237487795d952
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://aeronautike.com/userfiles/file/74166104136.pdf In PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/68d9912d9a5ab0886fa9c107ac049780/88910898181.pdfIn PDF document text
    • https://netshopnepal.com/userfiles/file/dirir.pdfIn PDF document text
    • http://ahrestygz.com/userfiles/files/20210617_155234.pdfIn PDF document text
    • https://thai-airpark.com/ckfinder/userfiles/files/wagulepaxixa.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/7423906639.pdfIn PDF document text
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/da7a571976ca1c6f602ed79f2430e1ab/loledasugalalu.pdfIn PDF document text
    • http://classofjoy.com/KK/userfiles/files/16774375286.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c59b997dd6---67073817146.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/b193dd94947288c35b6babf6176c2961/tegerabobajijobenugo.pdfIn PDF document text
    • https://jf-orvalho.pt/userfiles/file/88065655223.pdfIn PDF document text
    • http://eastcoastbiker.de/sites/default/files/file/53703625819.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/65ea7519868a36eff8becf6b6fe5ca24/69711019427.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/d9f1f378d87d71d46362d6527ee4c3e3/84925519884.pdfIn PDF document text
    • http://mtjjt.com/2013/upload/article/files/210718220717484034i4fg3.pdfIn PDF document text
    • http://lawngo.net/fckfiles/bamufoviwowipireb.pdfIn PDF document text
    • https://morabia.fi/images/file/gegisemitexoxifadogezugad.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609e46b204f07---gamipiv.pdfIn PDF document text
    • http://otohondamientay.com/upload/files/26688587007.pdfIn PDF document text
    • https://chung-pei.com/userfiles/file/25378050203.pdfIn PDF document text
    • http://ecohouse-lab.com/userfiles/file/fukoregoneramubofejazur.pdfIn PDF document text
    • http://osheamaloneynylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/22766558819.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/mf4mtj0j71po2b99d9jiat775n/29683102970.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=langue+et+civilisation+francaises+mauger+pdfPDF 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_off0000e2f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB04 18804 bytes
SHA-256: ebfa1a7e89a8cf1941604e9599404d1a6766244a839d9cf80f1114dd9c4f50f2
font_02_sfnt_off00012a36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A36 11088 bytes
SHA-256: 81e29f8f45c7078d9b873b58cb870b441bb920720fcf9f0b2b9804a8d1d6d5b5

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