Malicious PDF — malware analysis report

Static analysis result for SHA-256 93e0d27225656333…

MALICIOUS

PDF

84.6 KB Created: 2021-09-06 07:43:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7493bc9b59d12e0cd61cb0073eb1bf78 SHA-1: 7e1a9220e03f568345b4a9eab542be4af24563c1 SHA-256: 93e0d272256563333b1e5cd97c71f0e60b440c627faaf823449eb057a24ca26f
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, with numerous URLs pointing to compromised CMS upload directories, suggesting an attempt to lure users to malicious sites. The document body is heavily obfuscated, preventing a clear understanding of its specific content, but the overall structure and URL analysis indicate a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://carrieres-pierre.com/userfiles/file/71762211914.pdf In PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/16076740790b55---nugujojulavi.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/2b8e2f5ffaf361bba781b78ece241176/tatog.pdfIn PDF document text
    • https://vieclamxaydung24h.com/upload/files/vukalagofopadekazi.pdfIn PDF document text
    • http://luxcottage.ru/stroykamen/userfiles/file/sunibimazakabobebenuwigo.pdfIn PDF document text
    • http://marchmont.ru/imgs/file/wabowexem.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dd5f381dc4d---togugonukazujupozizuzefa.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/7e982e01f9d912de08f6b4c6c87a526a/23995959192.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160b641a0c0158---viramojepowemogusobuz.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160791f1893e70---lazababoraxazakemik.pdfIn PDF document text
    • http://aivieksteslaivas.lv/userfiles/file/xazekubara.pdfIn PDF document text
    • http://aapltd.net/userfiles/file/32100459137.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608ef76367e58---23720812084.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609219f27c413---59528603346.pdfIn PDF document text
    • http://farmaciafoglia.eu/userfiles/files/gegerujas.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/pq6f2gqhdqi63d67r58scp3ar2/91088042031.pdfIn PDF document text
    • http://fcv-bo.org/data/fcv-bo/userfiles/file/38480874223.pdfIn PDF document text
    • https://hzautomatisering.nl/userfiles/file/90147011108.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/91431663131.pdfIn PDF document text
    • https://eqonetech.com/upload/userfiles/files/rorusosodutadekuvebale.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/c4e536ab1631b7630ded770c56b97022/51486663899.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/da53f67fb92a93606e49c0d05a1e06b4/gipepem.pdfIn PDF document text
    • https://arerp.kr/data/file///67780090795.pdfIn PDF document text
    • http://laduses.nl/image/file/42483994982.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=ethiopian+traditional+music+instruments+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_off0000e255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE255 18812 bytes
SHA-256: 29aa181ba98424bbbb8d0e2a88ffe1bd886c26b8d7f084da5a5033f9f1a8ef7d
font_01_sfnt_off0001131c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1131C 10968 bytes
SHA-256: eab9d75c4a3c2602cfbbdf8d13877e8c191a0427115c8d99ed0f910a6373bfc7
font_02_sfnt_off00012c62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C62 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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