Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad29f2dd7c207ebb…

MALICIOUS

PDF

84.5 KB Created: 2021-09-01 13:28:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e76eb7587cd938e407ac95343ae611e7 SHA-1: e779ba1bddc3e8e87869b777940c7dca111c9b2d SHA-256: ad29f2dd7c207ebbd41be120f83a359893f7e39f1ac06546182eac36658805e9
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. The file contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure point towards a phishing or malware distribution scheme.

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 http://lnyuanzong.com/uploads/files/20210701015732.pdf In PDF document text
    • http://mamaskitchenorder.com/uploads/files/61506017371.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/i22guk2rpq1ka666a84kc1j7t6/gexitajagijabe.pdfIn PDF document text
    • https://hotnews.md/upload/userfiles/files/tanus.pdfIn PDF document text
    • https://fultoys.com/userfiles/30792215164.pdfIn PDF document text
    • http://hersheyhigh1981.com/clients/37302/File/76075205864.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a5a21f15e96---17090641062.pdfIn PDF document text
    • http://drjoecarver.com/clients/49355/File/45081466524.pdfIn PDF document text
    • https://rachelrom.com/rescontent/file/57830454258.pdfIn PDF document text
    • https://viboot.com/ckfinder/userfiles/files/nuzesezimotinosuno.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/efa253b982c1235e0d4f649d11c9ce2e/15959287268.pdfIn PDF document text
    • http://chipublichouse.com/ckfinder/userfiles/files/xubovuredupelasateje.pdfIn PDF document text
    • http://www.coverseg.com/uploads/ckfinder/files/55503516979.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/e7f0f373209170f1351be80575781686/tofuduruxupipabexiziro.pdfIn PDF document text
    • http://sntaviator.ru/ckfinder/userfiles/files/wukusodijakaberemosufoda.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/i64pa5qehpint8odhlg7rm82o4/zexulojurovibo.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160774775c9100---dadumejuxibolofedipefusel.pdfIn PDF document text
    • http://studioagm.it/userfiles/files/27357566322.pdfIn PDF document text
    • http://alliance-vietnam.com/upload/files/lovexirelowukexop.pdfIn PDF document text
    • https://5a.ro/ckfinder/userfiles/files/ginupukum.pdfIn PDF document text
    • http://lighthouse-connection.at/myPix/file/folazusi.pdfIn PDF document text
    • http://tinhdaurosa.com/Images_upload/files/kekugixuvarajeloz.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160ab63d6e5e11---debitevepabebifaxavosegos.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=download+convert+word+to+pdf+for+windows+7PDF 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_off0000e536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE536 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4D 10816 bytes
SHA-256: ac62cea51e47e9a8304cb359b33c860003b56270512d437cac1e2eafb6090092
font_02_sfnt_off00011676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11676 17348 bytes
SHA-256: 47ffebf4b6bd81a3c43effffd6316be394954675711e1de0cef8bbc0c34a84b9

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