Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bd158f55b98dea8…

MALICIOUS

PDF

87.2 KB Created: 2021-09-01 13:06:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 1a08ca1915475ea2a2727618f2345d97 SHA-1: 2dac340cfe312082d166cbb44fe16b1639a4b18f SHA-256: 1bd158f55b98dea8502498d87719aff3e9fc65fa4f49240702d9547a79a5d9e0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://alexlunacoach.com/img/editor/file/84130854447.pdf In PDF document text
    • https://travelsafeway.com/userfiles/file/74805049403.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/75pn5jtgoqidt3t71ntapl79kt/85127877473.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/4186204437.pdfIn PDF document text
    • http://incomingmakedonia.com/files/files/ranewukuvunitotel.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608aaf47e320f---95066578707.pdfIn PDF document text
    • http://nktrading.qa/file/files/zibijedegubokeposu.pdfIn PDF document text
    • http://poketomecam.com/uploads/files/kilagomaxiluwerod.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/232b692679feb9ab66b6abdb346bf8a6/29973494861.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/sjbkmji90629er6s1ehev1mn61/gilab.pdfIn PDF document text
    • http://scottleddy.net/clients/862555/File/wenaz.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/i28fndjc3mlbvmjq4phdf2o73l/81622677604.pdfIn PDF document text
    • https://techinnsrl.com/writable/public/userfiles/file/vonimuze.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a1b4c209517---mofeme.pdfIn PDF document text
    • http://pizzeriagiganti.ro/imagini_ws/riwaxuvafuxulekomenizode.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9e98bb78d---gomamev.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16094278e1de02---95306004859.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210710115458580.pdfIn PDF document text
    • http://yjccnc.com/upload/files/wataxumikisezodemo.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0e1f92c50b---kowimeben.pdfIn PDF document text
    • http://szyqjsj.com/UploadFile/file/20210822180631399.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/2e642576a5313d77138c9e161e9b39ab/povufulekefubewa.pdfIn PDF document text
    • http://hotel-gerard-dalsace.com/upload/document/71085174059.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=toyota+camry+2009+manualPDF 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_off0000f01a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01A 17832 bytes
SHA-256: 7d905810b464e5d6ed2eadea4a8700d2f0974a2e89c91ab23a430255730894f8
font_01_sfnt_off00011e89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E89 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000136a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136A0 10588 bytes
SHA-256: 50a30db86611471a21ad05785c73585fa30eb7fd80d07d2af6d681eba9edc701

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