Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e9e09f0bd4f87ca…

MALICIOUS

PDF

81.6 KB Created: 2021-06-26 04:30:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 9007a70827d7b07ac393d91384275921 SHA-1: b65568f9f8e5dc722102319140549ac51a5d5204 SHA-256: 1e9e09f0bd4f87ca84a3fad606f34a0f7902e48ca2d3ef34c02f9112ec25021c
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links, many pointing to compromised CMS upload directories and disposable hosting, indicating a link farm or phishing lure. The document body is unreadable, but the heuristics strongly suggest the intent is to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/mqm11aeb39c53494aol1kb4que/xuduko.pdf In PDF document text
    • https://amd-export.com/site/upload/file/48848753269.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/59292940336.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/watefofonibunifunezawa.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/pefotuwejosobakekaviviwa.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/280726236278.pdfIn PDF document text
    • https://bravo-hk.com/userfiles/file/rodowovirebivimesapupawe.pdfIn PDF document text
    • http://pobierzplik.pl/uploads/files/88938334281.pdfIn PDF document text
    • http://guojingmall.com/userfiles/file///turotonovujuweg.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/459oh410iia7enjht1peo19hmv/tagewulonikibovufogez.pdfIn PDF document text
    • http://szakkepzosiklos.hu/upload/file/28823554485.pdfIn PDF document text
    • https://atl-50.com/files/file/68289173780.pdfIn PDF document text
    • http://rurisnet.org/images/file/2004914496.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/4e66f9ee5a957f97746120976ba9e8df/dilowivemog.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16090c6613ecc0---zukuwuxalilevedijos.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/a15237c35c6f4b204c87ca1a0993d90b/31032658341.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/orino0v2hmagegbjgeutcis5t7/woxuzulavupepaj.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a455f5d1992---86904003818.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/b7727aceded2d1fa6a4bcf6bfbd086a9/xelojakibitipaxisaz.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609cfce7a7a55---totokilewejikobo.pdfIn PDF document text
    • http://esthebel.de/userfiles/file/37923804511.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/wedosofifiwekelisuni.pdfIn PDF document text
    • https://diaochue.vn/userfiles/file/kizorumox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=have+a+good+weekend+in+italianPDF 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_off0000dadf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDADF 17348 bytes
SHA-256: 1dd30f8326e0dd4aaf3380254037f9959a2ccee62edfd6764af6843b210c2ef5
font_01_sfnt_off00010805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10805 10388 bytes
SHA-256: 88fcf1e21920ac7d9fd21fde0c04521d47361997965838569e1447515be1bf54
font_02_sfnt_off00011f6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F6B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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