Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0feda30af231fe1…

MALICIOUS

PDF

92.2 KB Created: 2021-09-03 09:03:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: de44233ea2c0667fb471c265c05aa1b6 SHA-1: 4896a3c4f8456674ee1123a046b8280582cea047 SHA-256: d0feda30af231fe137650dce92ce95e51b5208156df6561374518e32eda2ebaf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous links, many pointing to compromised WordPress upload storage and disposable hosting, suggesting it functions as a link farm for phishing or malware distribution. The presence of embedded URLs and the overall structure point towards a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://stewartreunion2020.com/clients/2/2a/2a0d9dcdd57715375c9f4393c24df0f2/File/sorinifulojepu.pdf In PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210713040436188.pdfIn PDF document text
    • http://skupka54.ru/upload/m/10810897390.pdfIn PDF document text
    • http://hoanggiaphatland.com/uploads/image/files/38054544497.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612579cba1ef2---pekimedozakusuvav.pdfIn PDF document text
    • https://mmszke.hu/files/file/14499594976.pdfIn PDF document text
    • http://familycrawford.com/clients/3/31/31f1fdc6e90c562b7578e9c437f7c1bf/File/mubilamekediwoxowesiwuw.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16090c5bf82c61---xenagotakisufa.pdfIn PDF document text
    • http://fitviewer.biz/files/file/97368589593.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/104712d44509aafcfdc1af6f98cc1eb5/76602618568.pdfIn PDF document text
    • http://ahzgbh.news-read.com/upload/files/45563359561.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c5d8889db6---37603219541.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/691283cb3f1a3348d37eb3ad19cd2330/96666181004.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/xelubezixopobaja.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160914c716068a---80927559660.pdfIn PDF document text
    • http://feast.to/upd_file/pazuxoxolukimabuwipanawu.pdfIn PDF document text
    • http://mueblesdepladur.es/1/userfiles/file/66739142061.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160d0614c2130a---5021837449.pdfIn PDF document text
    • https://0900107678.com/upload/file/34380001538.pdfIn PDF document text
    • http://abwclayton.com/uploads/files/76519176914.pdfIn PDF document text
    • http://cuacongtudongbinhduong.com/upload/files/suzeduninugususobuxaki.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/e5faf39aea83dae1fdb2a627f4d23fac/30666450603.pdfIn PDF document text
    • http://proxima-design.cz/files/file/63717972174.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=treasury+risk+management+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_off00010224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10224 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011a3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A3B 10944 bytes
SHA-256: eaa651fb27f107d8952baa0ab0191acccd86e18c1a1b91cd4271cfa43c46dc69
font_02_sfnt_off00013366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13366 18328 bytes
SHA-256: a82e1f3d1820a65b2979350632c62bfd954369fe1ab14f955e8bc9d7e7d7f3dc

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