Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d507b7d46f5a0fe…

MALICIOUS

PDF

77.1 KB Created: 2021-09-05 12:09:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 658982aecc809347dfd09adbe10ec205 SHA-1: 1c7a8c2b0a22587163e5a9c1bc5fbb76727be2ba SHA-256: 1d507b7d46f5a0fef303d88929da805994b79cafa4e8a357ed211f574af845cc
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm containing numerous URLs pointing to compromised or disposable hosting, suggesting a phishing or redirection scheme. The presence of external URIs and the classification as a 'Phishing.Trojan' further support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

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 http://staractivecollection.com/resimler/site/files/fofifoji.pdf In PDF document text
    • http://omonetach.pl/foto/ilustracje/file/97089158993.pdfIn PDF document text
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160aa9bdd630f0---bamopejodume.pdfIn PDF document text
    • http://lejonhund.com/upload/ginamisebomokup.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/7e2559ae49ba76cf234a6b32acabb472/53230754139.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/767e6ebfec5468dc811a48d5a44c67ae/35946274565.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160824282ec53b---96809443080.pdfIn PDF document text
    • https://carcable-bg.com/uploads/pictures/files/pobubijizeliparumoba.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//20295915897.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e1f6ba7f6---81352620003.pdfIn PDF document text
    • http://eachfun.com/ckfinder/userfiles/site_eachfun_com/files/30325275435.pdfIn PDF document text
    • http://thesciencenetwork.org/uploads/files/45967485595.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed11fb41a7---xukukepo.pdfIn PDF document text
    • http://ecogestval.com/userfiles/file/pivobanex.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/74b512bc12f8dc0c5fb95ba88d37914b/9969666898.pdfIn PDF document text
    • http://alvitraders.com/files/mafuwumutorifazagivu.pdfIn PDF document text
    • http://dzirerealtors.com/uploads/soxogakoxigibomobo.pdfIn PDF document text
    • http://araonline.hu/uploads/file/vuxukopafozed.pdfIn PDF document text
    • https://condominiobrisasdelnorte.com/userfiles/file/29112226794.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/t1ffldjvbha8e71uqm2inrlc04/11480877724.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/zexerabereruxo.pdfIn PDF document text
    • http://letsbelegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/49013661125.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160a034c26dcf7---80550017038.pdfIn PDF document text
    • http://amidoux-peintures.com/ckfinder/userfiles/files/sinexibugubufone.pdfIn PDF document text
    • https://stef-nancy.fr/upload/document/diripaxav.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c1d3dbaf6---75458418238.pdfIn PDF document text
    • https://stopserv.ru/files/file/rexuwob.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=english+test+c1+with+answers+pdfPDF 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_off0000cc18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC18 10900 bytes
SHA-256: 566ce4d4541ba72d4db4f7434d6778b58b0366601ff1342d9ccc6f6b35a3e36f
font_01_sfnt_off0000e520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE520 16012 bytes
SHA-256: 918f1656ae6dced761e4826f774444251e85fcced849fdfd4e8e4665977a8a76
font_02_sfnt_off00010e70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E70 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1