Malicious PDF — malware analysis report

Static analysis result for SHA-256 2038567cf2e99cf3…

MALICIOUS

PDF

78.1 KB Created: 2021-09-06 04:14:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: fdf14be6f2faf93560ff41a892c612f3 SHA-1: d475ad63dd9d57e2f746b8d13f489d7f3aca1462 SHA-256: 2038567cf2e99cf396b09aa2c685e495492f67a9d69ded18aa94957c55ea50c8
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, indicating a link farm for malicious redirection. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with attempts to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6558

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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
  • 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://coretry.ru/uplcv?utm_term=electrical+distribution+system+book+pdf PDF link annotation
    • http://clarksville.net/wysiwygfiles/file/saluziwugefu.pdfIn PDF document text
    • http://gaineyranchaz.com/userimages/femalatinev.pdfIn PDF document text
    • http://xn--aknmedcal-wpbe.com/uploads/file/35394026791.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/5305e669382a746aa9432fb91377728d/50562564344.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608daca03338a---73195543762.pdfIn PDF document text
    • http://web5gstore.com/Files/files/leruke.pdfIn PDF document text
    • http://xn--3bsx3iw22bmot.com/filespath/files/20210819160301.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/0a61f44fe29c12e525b276518dd05fd8/88762737017.pdfIn PDF document text
    • http://khamtribacninh.com/images/files/fasujuxirevo.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/51e65049691d4cd33c4bd2ba38d4db21/88618528717.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/6794c8088019dc5dbaa0cd481f21e4b4/5365291010.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf2ad7fc54---lapuvoxubixazewitobezol.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1608de2a783237---jobelalekojedajorudi.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/160942b810dddb---79786420646.pdfIn PDF document text
    • http://hkt-optics.com/hkt/images/userfiles/file/58383811970.pdfIn PDF document text
    • http://bigbazar.cz/is/images/FCKeditor/File/kevisamep.pdfIn PDF document text
    • https://celebicatering.com/upload/ckfinder/files/ganekow.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609868aca4269---zevijiweverinez.pdfIn PDF document text
    • https://sharjahcements.com/images/bulk_images/files/rewojadu.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/4590531e6472bb6cb0cb5cfc91f7f600/zajomaduxunatabivoges.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/ti4tim3sah36dof9et73he2d20/79687395556.pdfIn PDF document text
    • http://tiszaikaland.hu/upload/file/85196555440.pdfIn 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_off0000d851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD851 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF063 18436 bytes
SHA-256: 4a1f2130cd60e9249d56e4e67673d6a83d68447956326555fd5ad3509786bda2
font_02_sfnt_off00011ff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FF5 11208 bytes
SHA-256: 604706a0cdca105b287d85915e2cc500920d40a3bc1ecd80160e652752edb673

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