Malicious PDF — malware analysis report

Static analysis result for SHA-256 98915e68a7faaf8e…

MALICIOUS

PDF

88.3 KB Created: 2021-07-21 05:31:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a91732741bc1d1e70bda18872f28bee5 SHA-1: 799f0dde510065b309c8305abd2e1a0f88a43aa2 SHA-256: 98915e68a7faaf8e49dcaf350bbdaa7692d567d2347f07e9bd7a752d5d33f86b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a link farm with numerous URLs pointing to compromised or disposable hosting domains, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering a secondary payload. No scripts were extracted, but the structure and URL patterns are highly suspicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://dichvugiayphep.net/hinhanh_fckeditor/file/73774592917.pdf In PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/cb85daf410272f7a5fd923286e8bccdd/kivuzuwap.pdfIn PDF document text
    • http://color-gateway.com/userfiles/file/zijujilufakedofabez.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/6a097e8f2567a181313f5f38695e7925/46846154121.pdfIn PDF document text
    • http://cpghollywood.com/userfiles/files/34995039986.pdfIn PDF document text
    • https://gloriouz.in/ckfinder/userfiles/files/pixokuvagivonuvel.pdfIn PDF document text
    • https://soosekszer.hu/upload/files/25502760362.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/fdb61ba328d76b1f9b4135a24e3f0003/nixotoridebunisidotuwuwu.pdfIn PDF document text
    • https://bywuf.org/upload/editor/files/55221885430.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c5991ab7767ea6748701c21daf422cec/kewisudawusugetowamikemib.pdfIn PDF document text
    • https://oklogistic.lv/upload/file/nopusapegutegurado.pdfIn PDF document text
    • https://spcinternational.in/ckfinder/userfiles/files/60320084660.pdfIn PDF document text
    • http://business-plan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/bagusiwafoka.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c84e380bd78---sufoligo.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/1b56c626acf7a07a170cda1a8f2ad282/vuxogilivisetimupuxa.pdfIn PDF document text
    • http://come2menorca.com/images/file/zopasapexipijubigedepovem.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/mab7sd53pmahoib5c6q920dn40/tixax.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/7314d53090c933d683df96487a840c00/40695253991.pdfIn PDF document text
    • https://cafesca.mx/ckfinder/userfiles/files/36700988677.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/ib854q0ra5me9bu1lfo67g0971/toxanafopowifejogujam.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160779c4d1bbb4---10973601678.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/m405srd2toqvedt34abuu97in1/dowuwowugalatekesewexig.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607bfc194040f---nezizivexinuruzubumatifu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=stream+of+consciousness+talkingPDF 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_off0000f44d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF44D 10948 bytes
SHA-256: d962e2a8f48ddda7d09adabae743c20ddbe08373d40e245d1856e1c2a74d3cd3
font_01_sfnt_off00010dac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DAC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000125be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125BE 17556 bytes
SHA-256: 2dfd8374b0af541e02d812167612202d339be5273175058d39baa29a0902acbb

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