Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9ca45bcd7080714…

MALICIOUS

PDF

86.7 KB Created: 2021-06-25 22:54:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5781c1f5f7770a73ca7d592805f8ce28 SHA-1: c7fc77cd98cff348c8e9470f1f1510b2ecf8a55b SHA-256: d9ca45bcd70807149d459f9b8469385630306c222a52800023835e2ed050d61a
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous URLs pointing to potentially compromised websites and disposable hosting. These links are likely intended to redirect users to malicious content or for SEO manipulation purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/79c888bb6c7b20f04af7a45878365d25/96158279819.pdf
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608004cf2ce79---kabapaxoke.pdf
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079988dab561---lodexazefolo.pdf
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/e765368af168451ad179dac8ef869dab/muges.pdf
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16095704fc7fd5---32577487049.pdf
    • http://animationcoach.com/userfiles/file/rikasikoji.pdf
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/84e5b061c1912f3371e1fb2fe4dcaa33/48770138891.pdf
    • https://airbays.com/userfiles/file/2974715893.pdf
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e52512e5dd---dezitaxixunafejakize.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/8dc4d40b5af7aada49d9938dbabccf6c/mudegigalagetozomi.pdf
    • http://ajtoablakcentrum.com/_user/file/tigizexifimefesakapo.pdf
    • http://recviem.ru/img/upload/1401229273.pdf
    • http://aylincinarli.com/fckfiles/file/87431407475.pdf
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abdcc88d7b3---52406398396.pdf
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097f6f341931---34707825671.pdf
    • http://nadiadsa.org/userfiles/file/babivevimemugodud.pdf
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160851333770a6---4369397026.pdf
    • https://www.varisistanbul.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607209419d184---15464662845.pdf
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/eed4a6e8aa0a9dbbbff267dc2a358a78/59478962797.pdf
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4384543b27---sigekonimuz.pdf
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d511b3247a---64498221352.pdf
    • https://basisnomor.com/contents//files/kuteme.pdf
    • http://hi-techfiber.com/userfiles/file/meritedagezapiruzosi.pdf
    • http://arch-teh.com/pic/userfile/77829310516.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/8a98927e8bc9a4693f4dbd3a06494799/jenudugokukefopopalewe.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=a+tiger+in+the+zoo+class+10+solutions
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef41.bin
e8afd25a6c069be84b206a228e31fbaa38a1e59e2e640805c78e560c721634d0
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF41 16676 bytes
font_01_sfnt_off00011a7d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A7D 16792 bytes
font_02_sfnt_off00013294.bin
dbc73637b16a07a07ed8b064e2a0dde8c5c934857c24df79143f33558f0a1784
pdf-font-stream PDF embedded font (sfnt) at offset 0x13294 10824 bytes