Malicious PDF — malware analysis report

Static analysis result for SHA-256 00f25a93fa1da080…

MALICIOUS

PDF

84.8 KB Created: 2021-07-08 20:55:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f614c0733834198c0067945b2f2c6952 SHA-1: 97e862b478b1ac4640f5a81770f540105607791c SHA-256: 00f25a93fa1da08015b4568b4285479cecc25c9102457a64937c1bbb99c74acb
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users. ClamAV detection and ML classification strongly indicate malicious intent, likely to deliver a phishing or malware payload. The presence of multiple external URIs and link farms points towards a tactic of distributing malicious content through a network of compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9780

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://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c26bc82dfdd---44934871867.pdf In PDF document text
    • http://agiusfuneraldirectors.com/files/file/78089428372.pdfIn PDF document text
    • http://computer-rudolstadt.de/upload/file/11359520509.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/04e2ff3c0066f5deb309542fdf942f86/44827718017.pdfIn PDF document text
    • http://alphanaturehk.com/userfiles/file/66503705255.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071a9043d69a---8140440061.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9a8b8f73f---77223404200.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/50850833402.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/31303471c4b400d2fe19ec49d3cf9204/zosixikikulerinevuzu.pdfIn PDF document text
    • http://ithaca1960.com/clients/8/87/874e400c25abfb160fd1c0cf9913fcd0/File/worusogosuxasobixakepimag.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c969421d9e0---18752221591.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/77b0eb2093f36e64f4195b986db565b0/rajazavulib.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/3k9i8ijvfh81t6g6t9bs2f17hg/nagimulerozetir.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/009d982b20f285fee439a17e63fe594f/8724044966.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/dijagozofo.pdfIn PDF document text
    • https://iqmuseum.mn/uploads/files/ligurilukomekizasozasovu.pdfIn PDF document text
    • http://modnyi-buket.ru/uploads/files/zakamepekik.pdfIn PDF document text
    • https://deniz-sogutma.org/img/userfiles/file/xejosenubekere.pdfIn PDF document text
    • https://aedwea.com/upload/foto/36053353219.pdfIn PDF document text
    • https://www.analfissur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2a9696efb---daxuvesagiv.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609721b7ec51d---levenoliwevid.pdfIn PDF document text
    • https://codecs.roimages/file/98239397044.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/1008a1b00d0de63c2992563a2e7f9920/mesebediv.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/7dgq6h97i8db534nsrbn33b1jh/xukajem.pdfIn PDF document text
    • http://atomleasing.ru/media/File/kosefosupoxerijevir.pdfIn PDF document text
    • http://elijasprojekts.lv/files/file/rinobunonisiboxi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=electronic+devices+electron+flow+versionPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2C2 16496 bytes
SHA-256: 70e4f29ecdc79601f06075b03d14bd2dbdee931bee96ff91fb4c81baa4339fed
font_01_sfnt_off0000fd9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9A 10444 bytes
SHA-256: 263e99460d21e83bd971b7a1bf6d73e5be1569fbb0cc35bc85e5be0a827353ad
font_02_sfnt_off00011573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11573 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00012d84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D84 16648 bytes
SHA-256: 4111edf2d6fccd02f97d8bebea6ca12ecd4ac029f68791f083bb9c51b51678e6