Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ae6d9a09a1a8867…

MALICIOUS

PDF

97.4 KB Created: 2021-09-06 09:29:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 81be9f9400806dd00f28fb0ce711308d SHA-1: 31feb1c603dc5cf1ef05f05eb798990d6c7b9323 SHA-256: 8ae6d9a09a1a88671505212fb1f0aa741fdbc1ae857b1874576c590e1845c523
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9883

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 http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076f3fca27cb---81142130758.pdf In PDF document text
    • https://www.ventisilva.com.br/ckfinder/userfiles/files/nomezejemifodadomadute.pdfIn PDF document text
    • https://tenfci.org/userfiles/file/38441579177.pdfIn PDF document text
    • http://lhs60to70.com/clients/3/32/32806278e47d7e4d905c37b1d6ebf04a/File/87811319279.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/wanetujadefu.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/cc45f2b840663da046570f0e6af59026/pekego.pdfIn PDF document text
    • http://j-club.eu/userfiles/file/sajerevuduvuvamazovogeto.pdfIn PDF document text
    • https://kultmotor.hu/images/files/80884542311.pdfIn PDF document text
    • https://locoffice.ru/userfiles/file/85896884498.pdfIn PDF document text
    • http://bradleyhillsapartments.com/demo/uploads/contents/file/23957170593.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d28d641e685---mugez.pdfIn PDF document text
    • http://digjamaica.com/app/webroot/files/77622311845.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160920ac90fd0f---loxagudetezepuxinadexe.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb48c07db8---werupuk.pdfIn PDF document text
    • http://alkanboya.com/files/file///92781390132.pdfIn PDF document text
    • http://supermarketdv.ru/files/file/xetezufelililozin.pdfIn PDF document text
    • http://cheumst.com/upload/fckeditor/file/botiv.pdfIn PDF document text
    • https://interstudy.net/userfiles/file/25575584356.pdfIn PDF document text
    • https://sananselmo.com/wysiwygfiles/file/90451412091.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/161131b7f6a144---49602342514.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/b5297f62eafc2f12dac5bc3f2d2448cd/nuposadolarapo.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/gibisidesomig.pdfIn PDF document text
    • http://labsshop.com/d/files/89999347993.pdfIn PDF document text
    • http://marthomaiticherukole.com/userfiles/file/6349147125.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=portfolio+pdf+2019PDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE978 24152 bytes
SHA-256: c0918fe7dbd133d7742fda2b5e6111bf72ae07e0d1760cdb243654a0792e69c9
font_01_sfnt_off0001274e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1274E 16412 bytes
SHA-256: 65597e3c2d80c751fb5d80ec4ca414406f942b77a531ed2e4f595a3c33e4bb52
font_02_sfnt_off00013e00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E00 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001560d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1560D 2048 bytes
SHA-256: 150f834ec46766607f371bee4a21c1c32e692ea36080a2cafdb57ad510b044ab
font_04_sfnt_off00015f6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F6E 10388 bytes
SHA-256: 2da3ea09f32f2752b25e648fbbd00e96429e407acd51768a87e341e6e0e679be

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