Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a4e1e15f24e49a7…

MALICIOUS

PDF

81.0 KB Created: 2021-09-07 23:57:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f412f557a3921db63fff34481dc51261 SHA-1: fea43af4ec07a5cc1e563bac19b1db4562cb8dcd SHA-256: 8a4e1e15f24e49a7ba931d70fdd5e61b85f257fbfd7376ffe717daa425fa54db
164 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a ClamAV signature and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to various domains, with several hosted on compromised CMS platforms. The presence of a 'link farm' heuristic and the use of UTM parameters suggest an attempt to manipulate search engine rankings or distribute malicious content through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://alnadaoil.com/userfiles/file/tivikotedosinim.pdf In PDF document text
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079d1114fd8e---raxirikawiradibirapik.pdfIn PDF document text
    • http://xaydunglenguyen.vn/upload/files/194b4f.pdfIn PDF document text
    • https://elminhaj.org/userfiles/file/kebapizuxenuwimazana.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/xujedemizigutapidedujijez.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/k4ue3m4pcvbdmjvjsb53tlkgt9/bopojazizufepavojiruk.pdfIn PDF document text
    • http://kasintorn.com/images/upload/files/mawimexatafoxi.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/8159396925e11b5264a74a1431ac4f3f/19978027325.pdfIn PDF document text
    • http://asv-solnice.cz/_files/file/pezufufefoxukatubi.pdfIn PDF document text
    • https://bazab.ru/ckfinder/userfiles/files/93707474708.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/a6413e496b1a6281cad5f803a1f0a5fb/ferisuze.pdfIn PDF document text
    • https://securitydm.rs/slicice/file/37122136772.pdfIn PDF document text
    • http://schokoladenfontaene.de/idata/45488850013.pdfIn PDF document text
    • http://www.siscbolivia.com/admin/uploaded/fck/file/52260129546.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/31863197414.pdfIn PDF document text
    • http://chiaranannini.com/userfiles/files/pivuxoloxu.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/umqjse71irlsfiq9n7073fv5vv/39899182446.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/ruxuloruxokogat.pdfIn PDF document text
    • https://kildevangen.dk/files/98076047863.pdfIn PDF document text
    • https://thic.net/plugin/ce1/ckfinder/userfiles/files/12597123858.pdfIn PDF document text
    • http://transportdiverse.com/uploads/files/57796281564.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=circle+theorems+gcse+questions+and+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_off0000d665.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD665 11432 bytes
SHA-256: d3417068ccf9c90ec3377d40b3d66276207f20a567b325cfcaeef611cf50bea4
font_01_sfnt_off0000f0c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000108d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108D9 17488 bytes
SHA-256: 02aab9f211e834d27900f98cde76032cd410fdeb5f96727d0b585d88bf7d855c

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