Malicious PDF — malware analysis report

Static analysis result for SHA-256 9078a8aabb7c1265…

MALICIOUS

PDF

81.4 KB Created: 2021-06-27 23:31:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 453b60ac5830f110d073ade34fa48897 SHA-1: 9f507288e453818ef3664794ddfa39847078c651 SHA-256: 9078a8aabb7c1265a4b1138944d66924014bdfbcf8edff846b0ae734e35f86ef
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. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting a link farm designed to redirect users to potentially harmful content. The presence of multiple distinct hosts and UTM parameters further supports the interpretation of this file as a lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://pixomot.ru/uplcv?utm_term=good+morning+tea+images+download
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/3a3a623d4c7cb0c7d5cdad6d3b604694/lekijufelogefujejekusik.pdf
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099a2fc043f8---9766444726.pdf
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/6a8cda6d0edf44fac2721d7c48561160/dewuduwapovelulonemones.pdf
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16099d07e14b88---bifepatalobur.pdf
    • http://udokutscher.de/gfx/userfiles/files/31584412749.pdf
    • https://mzr-avocats.com/buddha/ckfinder/userfiles/files/peluvizamugijep.pdf
    • https://bustotoronto.com/userfiles/file/33151843059.pdf
    • https://acryl-bg.com/userfiles/file/55164328445.pdf
    • https://mps-india.com/userfiles/files/69870203317.pdf
    • http://accomplishtheimpossible.com/userfiles_ati/file/porugifuludumeravifagu.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c91559c8d70---fajuditoze.pdf
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0b6f530e05---rivozexote.pdf
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c939854f7df---telapesibunozepufemisiwa.pdf
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/015dc79084605343647e48d69587d1d5/kafezipevilazub.pdf
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/a6abe3e08716136ae08cc996d67e7b48/dikapafodesupitukogos.pdf
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16080d1e7ba444---1159405936.pdf
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/ce4d8945d704475eef3f0ae3e645836e/71504979242.pdf
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc1a0669062---25410398387.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/4b70d1dd863dd53806770a1f17686de4/bavokoxukobisijosopino.pdf
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160bb486004cd8---81276114022.pdf
    • https://cpsguffanti.com/uploads/file/98968801421.pdf
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/a7c00a5a4d9a22df617060686c4847f7/diloxegitakisodip.pdf
    • 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_off0000ddd8.bin
0869c46017611bcfc4c38369798171b643c8db0a68c1651f40e8b9b2f2eb4443
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD8 10716 bytes
font_01_sfnt_off0000f647.bin
c892fc398943b0034304a2da18e3c763800abc3afa469148c0005892ce10d0c7
pdf-font-stream PDF embedded font (sfnt) at offset 0xF647 16200 bytes
font_02_sfnt_off00012065.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12065 16792 bytes