Malicious PDF — malware analysis report

Static analysis result for SHA-256 74f40b0647a62414…

MALICIOUS

PDF

103.1 KB Created: 2021-09-08 07:54:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 29388831654f75f26261505d57f90cba SHA-1: 1bcc49e8d9beba1c97fe4b7d4b12642007914997 SHA-256: 74f40b0647a62414980b9bfec31caa63b61b29f1b65e935154233c923ad03f25
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for distributing further malware or conducting phishing. No scripts were extracted, but the presence of many URLs points to an attack pattern focused on redirecting users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://jatyn.cn/upfiles/202105/file/1621557374.pdf In PDF document text
    • https://houstoncoinshow.org/FCKeditor/file/88984532579.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/3e1b1ef08817a7d712798e00ab7be7b2/senukusurejugijekagi.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609f693e8f12c---gelajukoxibewinisusa.pdfIn PDF document text
    • https://hoangphatdanang.com/uploads/image/files/99280137906.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/a9d6a2ca17219ce84221f7c373a45e1c/ketaw.pdfIn PDF document text
    • https://morabia.fi/images/file/56871557916.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/5f9d7ftrkd3do6fcdf07dj8ju5/61230403481.pdfIn PDF document text
    • http://deficanderel.com/clients/6/67/674a09facce11b7629d390eef9534ff9/File/83315462791.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160706c999297d---tebuvo.pdfIn PDF document text
    • http://patp1ryb.ru/media/file/64578642761.pdfIn PDF document text
    • http://client.diffuse.info/files/69933134889.pdfIn PDF document text
    • http://isvpro.com/custom/files/pumoranofaxevivil.pdfIn PDF document text
    • https://www.apollopowersystems.com/wp-content/plugins/super-forms/uploads/php/files/c412ce0576e4d207b7be46136cb34361/tagafe.pdfIn PDF document text
    • http://remproekt-m.ru/admin/ckfinder/userfiles/files/jovisitedakufofozibo.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d75cc317b8e---1640509933.pdfIn PDF document text
    • https://anaksemut.com/contents//files/72307464686.pdfIn PDF document text
    • http://ildungrice.com/fileupload/fckeditor/file/68156187774.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/nulutepadapofigoted.pdfIn PDF document text
    • http://jowinbio.com/upload/files/202108090847592248.pdfIn PDF document text
    • https://menlopark.com/wysiwygfiles/file/6005982531.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=bloomberg+new+energy+finance+report+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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012b93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B93 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000143aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143AA 11188 bytes
SHA-256: 52525accd46fea1b4a507dfd5a46c4a68aaaa6c6e6bc84c731f7a6012503a2e5
font_02_sfnt_off00015d79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D79 18848 bytes
SHA-256: 557842691b1547199b17f0b55f8089fde1a7764ecb7f107b4d7559c95cdfdf42

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