Malicious PDF — malware analysis report

Static analysis result for SHA-256 70059e7071c71125…

MALICIOUS

PDF

95.1 KB Created: 2021-07-31 19:44:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3f0cca0411a424dc61ff7609cfb1108b SHA-1: 0e5f53130a873a8a4fe0b93aede852e21d6ab26e SHA-256: 70059e7071c71125720fa55f067c647f574aa19847c36f9c50829faea8c67b39
156 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to compromised websites and disposable hosting, indicating an attempt to redirect users to malicious content. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall pattern suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/f4601655ab1bf35e95c8c36b129a6793/xawagobutezixak.pdf In PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609ef3e0aec9d---rajikop.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/n9lu76g7tbr0hb6d07s86lktjl/41951301125.pdfIn PDF document text
    • https://paperland.bg/uploads/file/30274073049.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/40858231196.pdfIn PDF document text
    • http://nsdadventist.org/FCKData/file/42132925880.pdfIn PDF document text
    • https://fotofidelity.cz/userfiles/file/ditemewenenarezekibaxuge.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160c3b234f1982---10142084635.pdfIn PDF document text
    • http://duda-tech.pl/dudatech/upload/file/14135917782.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160945bc7307af---bizenufulorisaj.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/8dc48d69fa976c969feb473ff56b2048/pifajotawisupafaweluxu.pdfIn PDF document text
    • https://tempatpasang.com/contents//files/rifakadara.pdfIn PDF document text
    • http://gshosnab.ru/userfiles/file/17094812054.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d88426907a---27230177197.pdfIn PDF document text
    • http://criminisiepartners.it/userfiles/files/vinudolurodewukekovarax.pdfIn PDF document text
    • https://bartonsteel.com/tony/barton/ckfinder/userfiles/files/woriju.pdfIn PDF document text
    • http://kapalishakti.com/ckfinder/userfiles/files/sinodabuvododetu.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff4fac1090---letidineriborutijuxeterik.pdfIn PDF document text
    • http://ldbell1965.net/clients/85689/File/4342637516.pdfIn PDF document text
    • https://brawlcall.com/ckfinder/userfiles/files/83961935646.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/b6oun2a0adsg6fdntb1kjkb02c/jezokiserejir.pdfIn PDF document text
    • http://dailitara.lt/bites/uploads/file/niwobasojulurufuxu.pdfIn PDF document text
    • http://scholl2021.com/clients/1/19/19bca4f76d5065ca3bffbfc1c67e7925/File/38492151963.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=how+do+i+cook+fish+on+a+george+foreman+grillPDF 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_off00010df6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF6 10992 bytes
SHA-256: ff07f0573c971116cba00a0070ab640ef20e783ab0061473ddd175f312b63589
font_01_sfnt_off00012716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12716 17300 bytes
SHA-256: 72ad32bc70ed344f0b09e0fb253ab98b4ddba4bb278dca15d14698595a2f4fd5
font_02_sfnt_off00015441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15441 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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