Malicious PDF — malware analysis report

Static analysis result for SHA-256 e14a29d04db80f3f…

MALICIOUS

PDF

83.8 KB Created: 2021-08-20 19:55:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: fa33ce43c8860ca0cb53cab4447ee9d8 SHA-1: bce89cb11d68fb0066bd88e8e1ee75e1f13e2394 SHA-256: e14a29d04db80f3fda569c4e4cdb19fd2e4768f7e53e9d6a6a683d02c8cfd6a2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains numerous links, many pointing to compromised WordPress sites, which are likely part of a link farm designed to redirect users to malicious content. The presence of these links suggests an attempt to lure users into phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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 https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607497f2a4546---xosifaxiwe.pdf In PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/a93f2hlk7g84fu1la303ke2jvh/dosaxoperababugek.pdfIn PDF document text
    • http://7166867.ru/ckfinder/userfiles/files/31243550042.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b2220f6882f---68691406560.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160ce07bca1f9b---wutojuledenijojiwulak.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160771849a9ad3---luguneleworidopor.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c0518bdcd8c---divakapezegabalarena.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607517fdb2f44---setukuw.pdfIn PDF document text
    • http://ydtmuhendislik.com/ckfinder/userfiles/files/xarunaraxifajixo.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a26e7be1615---96628925672.pdfIn PDF document text
    • http://santamariamikado.com/uploads/files/vabajinutatikuzo.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/07bdffc7a7851108d22e38dd78fadaad/6454662177.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160972a253c240---67038937654.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/urlj4hikf6vo5k5bc4bdibmkt6/munonuwenumin.pdfIn PDF document text
    • https://adtw1.com/ckfinder/userfiles/files/fapevezigelidifesotosumar.pdfIn PDF document text
    • http://cinebuzz.be/uploads/userfiles/files/53403543637.pdfIn PDF document text
    • https://www.artikel238.nl/emmwebbit/resources/ckfinder/userfiles/files/41689272199.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/72535696121.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/3291d46ddab34cf3e22fe07a386c8500/92610613968.pdfIn PDF document text
    • http://jar-ted.pl/file/xivinuboxovi.pdfIn PDF document text
    • https://nmg.lv/img/uploads/files/69532448121.pdfIn PDF document text
    • https://llsindia.in/FCKeditor/file/guwasopevanususuw.pdfIn PDF document text
    • http://sun-green.nl/ckfinder/userfiles/files/9991282640.pdfIn PDF document text
    • http://www.bash.cl/media/file/junazolukesuvaxepo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=who+is+the+antagonist+in+the+interlopersPDF 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_off0000e7b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B8 16100 bytes
SHA-256: b59f67484ee751256756dacb85a08c9b7a52fbe25d9b32cb62998bb71cbfd377
font_01_sfnt_off00011157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11157 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001296e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1296E 10524 bytes
SHA-256: 3de12f4da8030dd37309e2af1e7d7523d52bd5d67bda6ebc2012bc45dde2411b

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