Malicious PDF — malware analysis report

Static analysis result for SHA-256 1530af167032dafd…

MALICIOUS

PDF

108.4 KB Created: 2021-08-05 01:29:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d687f97530d65971a9563e76403c8768 SHA-1: 6297da8e8e00d4d5130544c9dffdecceb414f5a5 SHA-256: 1530af167032dafd67fec34ca3e007b8982c224c4c1d43a937f504435de40a06
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple compromised or disposable hosting sites, which is a common tactic for phishing or malware distribution. The embedded URLs, such as http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/udjide1keg1p5upr7khracq7ke/lesapimasosagek.pdf, are key indicators of this malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://ntouioc.ntou.edu.tw/ckfinder/userfiles/files/samiberesitopudazigu.pdf In PDF document text
    • http://archerelectricsupply.com/userfiles/file/vinowemejokowanireno.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a22e6900f4f---dizoxenuvitubulajo.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2b40e4428---bakofowazogurixavutezulus.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/fa56af84260096c72b14394364d80fa5/57314968733.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4b8ccc175---40267851490.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075c196c91cc---wakinezij.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab87a28cfb6---duvowakakegebenuk.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/238ee9abdf7a28dd359c9254bbf03498/jijirivimozuboba.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa8f77db29---mikepejavabat.pdfIn PDF document text
    • http://hzdshg.com/images/upload/File/gatolaje.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1607c032d2ab25---kepegubupevefobikowasuz.pdfIn PDF document text
    • http://grafichesirio.com/userfiles/files/61465621206.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/44bb43263da8e1014c175a9d9730838b/vonazekonojoz.pdfIn PDF document text
    • https://internationalmedia.com/userfiles/file/86004122453.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/64cdd7a76ec5c604456b752d8bfc5625/24123495134.pdfIn PDF document text
    • https://burgas-remonti.com/userfiles/file/zuzeganazegevofipopuxewo.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/26fb7e8f2a80fd67ed68f0faedb83a10/wasemunuro.pdfIn PDF document text
    • http://leadershipcareer.kr/fckeditor/_upload/file/wusixelidetonub.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/18108544313.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608343ffab5c6---80298951739.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/udjide1keg1p5upr7khracq7ke/lesapimasosagek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=dr+collins+pcat+redditPDF 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_off0001416c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1416C 10508 bytes
SHA-256: 71692807cc7ccd2973a14956b7617f3a5306e5abdad567a5aad2a60545515e8e
font_01_sfnt_off00015969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15969 18788 bytes
SHA-256: 6f75e6c27f244c95b6cac5515d99a6b9ed65aa0bb8b8c7f22f03aedac8a74d25
font_02_sfnt_off00018b6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18B6F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.