Malicious PDF — malware analysis report

Static analysis result for SHA-256 095432e8128dd77b…

MALICIOUS

PDF

75.3 KB Created: 2021-07-30 21:17:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 521b421eb72c110cc049a619790c4558 SHA-1: 304feac20a6ad2be08986ac8a64c6f86e60b0949 SHA-256: 095432e8128dd77b7b19a5bc962adfe6112a09a2e94d68e59fed9a982811fb5f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs and link farm heuristics, suggesting it is designed to redirect users to potentially harmful websites. The presence of embedded URLs and the nature of the heuristics point towards a phishing or content-luring attack pattern, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://allytemp.ru/uplcv?utm_term=aimbot+counter+blox+roblox+offensive+download PDF link annotation
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/58ff769875509bfaa7386b43635852a0/24318466777.pdfIn PDF document text
    • https://mdteam.se/ckfinder/userfiles/files/42558854757.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/db172635b177f6f744fd669e51fd8c2c/zedavinoxuxinopogezidirug.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2da2c0f3d---ledujowumowasi.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1608333a28b155---83435985997.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/guvonemer.pdfIn PDF document text
    • http://apvn.info/userfiles/file/29165142934.pdfIn PDF document text
    • http://hit-air.pro/ckfinder/userfiles/files/fevabipivurivab.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cb89a2979f---sivefelesuwemolivekikiban.pdfIn PDF document text
    • http://www.medicellbank.com/userfiles/files/zuwinodedoxonaf.pdfIn PDF document text
    • https://abicecream.ru/ckfinder/userfiles/files/kolavugimoxutopobe.pdfIn PDF document text
    • http://sskj.pl/userfiles/file/1626967659.pdfIn PDF document text
    • https://fruzsiflame.hu/userfiles/file/3392400942.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a63bdb5cdac---52458862771.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/1d7ac50a3578d05716ca2d5c618f8105/sokove.pdfIn PDF document text
    • https://carsen.sk/editor_uploads/system/files/dizawoke.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/56829147191.pdfIn PDF document text
    • https://pt2-turbo-j3t.com/contents//files/78739077434.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/1609666cc29bee---fununifekurepemisex.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/84447590377c3c4c41ee728ea8aeed71/narebevoxodijelalerirazer.pdfIn PDF document text
    • http://kavernoklub.com/campannas/file/mugato.pdfIn PDF document text
    • 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_off0000be36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE36 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d64d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD64D 11112 bytes
SHA-256: 050ff17f4f7887350bc576ce586299387d68a936b94656f9f06bf98d8c7396b2
font_02_sfnt_off0000f04e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04E 18136 bytes
SHA-256: c7a733e95e1f39250e33c452ae4fadcfe8ae228ad740c662d756b77ac1969004

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