Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd4302036ca58768…

MALICIOUS

PDF

72.8 KB Created: 2021-09-25 04:26:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 51b87a372682bc15362bcd05dfc541ac SHA-1: a4436ad8d08107042d6e07a0070793d24db7f48a SHA-256: fd4302036ca58768c33929408b121ba81fa1984d2abdd2524e0f8ba469d836fe
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan-like nature. It functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised CMS upload directories. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 http://provia-events.de/pics/fotos/1/file/sezibafe.pdf In PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/22b245gkd3f8akn354166r06f2/rilezenajijerixosax.pdfIn PDF document text
    • https://aksukartela.com/images_upload/files/29980192998.pdfIn PDF document text
    • http://9y.bfage.com/upload/files/20210914102600.pdfIn PDF document text
    • http://filippodelvita.com/demo/userfiles/file/wenebodogedigije.pdfIn PDF document text
    • http://sgadsahodayatarntaran.org/sahodyatarntarannew/userfiles/file/67756848813.pdfIn PDF document text
    • https://drjou-vc.com/upload/files/rijiforokeseviner.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614d754ccf394---dejus.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/5ulqovhr1k8hjauvnufng7rav4/66824281915.pdfIn PDF document text
    • https://nutrishop.in/ci/userfiles/files/vafasizodag.pdfIn PDF document text
    • http://przedszkolenisko.pl/userfiles/file/86189584558.pdfIn PDF document text
    • http://www.gitialiganjlko.org/ckfinder/userfiles/files/runomudanusaxefivepadalil.pdfIn PDF document text
    • https://mamotato.ro/userfiles/file/nujidovage.pdfIn PDF document text
    • https://drterrace.com/london-100.com/userfiles/file/88082166541.pdfIn PDF document text
    • http://qlionshousing.ca/userfiles/file/45626622378.pdfIn PDF document text
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/vobiwujomarixemorede.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/be0703ad4af9f20204a9b5059f7686a4/34166218321.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614839449f982---34489903019.pdfIn PDF document text
    • https://wigs4less.net/nbloom/fckuploads/file/kaberapitelofor.pdfIn PDF document text
    • http://athaj2.specialty-match.com/upload/files/lorirogizuto.pdfIn PDF document text
    • http://le-bouquet.be/userfiles/files/finudimefaduruniredubid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=nitro+nation+mod+apk+2021PDF link annotation
    • https://mediaget.com/userfiles/files/65082566486.pdfIn PDF document text
    • 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_off0000b5ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5EC 10572 bytes
SHA-256: c7cfe589c541dbb4f69ca38ea9cfe80e77d88b2407f213985101802912e3f501
font_01_sfnt_off0000ce0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE0A 18536 bytes
SHA-256: fd12201af468bd58101f6759c9d4319f7adea213cbaedf761403721e1ae0390b
font_02_sfnt_off0000fd6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1