Malicious PDF — malware analysis report

Static analysis result for SHA-256 68a9d5c28befa8d4…

MALICIOUS

PDF

85.0 KB Created: 2021-07-05 14:37:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9edd5a87c8b26b4ee90176d2c977984c SHA-1: c6bc1d42a191f1963f6910afff7bc9b51f2e6246 SHA-256: 68a9d5c28befa8d4cdfdc67f54466ca3c80cb34a3c914728be469d5ea566b053
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body is unreadable, but the heuristic firings and URL analysis are sufficient to determine the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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 https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/9629db8a2a92bbc2abfb618a2304992a/60409428830.pdf In PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/9a5788d974addce77e2ea95444288069/jovijisudujuwitoginega.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086129d5413e---93855741544.pdfIn PDF document text
    • https://yepsell.com/userfiles/files/sanibatomup.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b23f0a6836e---midenimufasug.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa99f237a37---69217017843.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c95fbc1ee38---163717667.pdfIn PDF document text
    • https://netshopnepal.com/userfiles/file/14761649707.pdfIn PDF document text
    • http://aryajob.com/user_upload/file/rukoj.pdfIn PDF document text
    • http://amon-syotengai.com/userfiles/file/rotirataninax.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607d198421a71---bopuki.pdfIn PDF document text
    • http://baodieptailor.com/uploads/2021-06-27/images/files/32796244322.pdfIn PDF document text
    • http://mofrantech.com/userfiles/file/98993859894.pdfIn PDF document text
    • http://abwjefferson.com/uploads/files/61321091714.pdfIn PDF document text
    • http://garderoba.sk/images/_file/59534005812.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f702812bf8---famev.pdfIn PDF document text
    • http://dzbnf.com/upload/file///89015484331.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16099adc999c0b---31654200810.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d04fc4d494---gilugobapelanas.pdfIn PDF document text
    • http://amandamaitland.com/images/file/69307407790.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/4ee2ad5c9b8a617bd332a564d3096a3c/lotuwizobu.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609018240be10---garujenazirisenifipobavej.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a256503195---gufusexup.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/588a6c6f1efccda5e14d34940aaf2eb8/xawerexavatejelej.pdfIn PDF document text
    • http://indagosrl.it/userfiles/files/81639980120.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/35130438463.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=certificate+number+on+citizenshipPDF 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_off0000e9d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000101eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101EB 11028 bytes
SHA-256: 1766e2f8adefc3025f9fbe1d90aa245d3525e8bb4423bfbc61c6604ca6a52e19
font_02_sfnt_off00011b40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B40 16736 bytes
SHA-256: 805a7d6b41aaab50c4ccf350bf45e5b0c546525a9244fd94f9d922e986b4ba75

Open this report in the interactive analyzer, or submit your own file for analysis.