Malicious PDF — malware analysis report

Static analysis result for SHA-256 10af0f014292f5a0…

MALICIOUS

PDF

84.8 KB Created: 2021-08-08 22:00:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d654d8666c45f1747aa48901b0561907 SHA-1: 8a18ef248ff74af7eb944431f740e5724745fed8 SHA-256: 10af0f014292f5a0db2c5819f8e6630c1efa95d4dd95bd02ce771344d7a12829
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://canyonoaksmtg.com/~duckdi5/canyonoaksmtg.com/content/file/5347296327.pdf In PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607302bb48889---zofalebelobesin.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/4daaf680cf885c4fa3a8a8dd6a8e4a37/83364034511.pdfIn PDF document text
    • http://xn--12cm8caae5d9a0a0a1dxk6dd.com/user_img/files/jogabasofutuji.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16089bc384cae3---rapavumikix.pdfIn PDF document text
    • http://nyett.hk/uploads/news/files/74504344356.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1609baa0327c4c---roxagukumofafugajigirowud.pdfIn PDF document text
    • https://franchise-vietnam.com/app/webroot/img/files/jubawutulos.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606c95251561c---zowenenabozatoxugid.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160840f0208f34---pigixemadaxidilunigad.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609af5485f511---69815040583.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/5dthuis0v4uupug3b93t9m3udj/rogopuvuzenuma.pdfIn PDF document text
    • http://pure-chiral.com/upload/files/58713547564.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/57794608768.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160e0fe508b6a5---sapaxojufejabenux.pdfIn PDF document text
    • http://pkynfe.net/userfiles/file/dikojokedukamor.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160a32c212eebf---tixipaperusigotifamuk.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160961b3bf2191---7595364282.pdfIn PDF document text
    • https://aarhuskortet.dk/images/file/tesodabufajonufew.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/27943cc7bfbbb001b56752d339c9b201/wexanuvadegatupujexepor.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/3432c50be45d0fb92a7006fbae09b155/felavaselivuxufaxekum.pdfIn PDF document text
    • http://theemasternetworker.com/ckfinder/userfiles/files/moduxeka.pdfIn PDF document text
    • https://freshchannels.com/home/sites/freshchannels/public_html/ckfinder/userfiles/files/47717202856.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/67111153363.pdfIn PDF document text
    • http://mamtomchabahai.com/uploads/files/files/forilulifobuzimulegij.pdfIn PDF document text
    • http://aldara-latinoamerica.com/userfiles/file/bejanajav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=god+of+war+4+apk+%2B+data+free+downloadPDF 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_off0000eaa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000102b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B7 10528 bytes
SHA-256: 05e5e777a15f51228137f4975231acf03b04eed0e7d53dcaa49d7d59fd3c8f51
font_02_sfnt_off00011aee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AEE 16336 bytes
SHA-256: 11ff5e13633029f7f9bfa8ca1a2ff30cc202ba178f35931d17c2b5be356e0a4f