Malicious PDF — malware analysis report

Static analysis result for SHA-256 0426fab45e8a6430…

MALICIOUS

PDF

77.6 KB Created: 2021-07-27 20:11:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6a0ce8ffd3486ee669696c129a0cba72 SHA-1: 9284b0edde61d78ff89e0a4d6ec352e555ca9601 SHA-256: 0426fab45e8a6430c0a476b4ba87038578b49d90336a2766419c7802fd73ffc0
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The document body is heavily obfuscated and unreadable, providing no direct user-facing lure.

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://freehajjandumrah.com/admin/admin/uploadfiles/file/37948162049.pdf In PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a82b1c2af---3659915659.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/6a05f28dc20baed5de13e21ecd16a2af/modemuro.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/426000e0bc499168b9b92c01d8ac4d00/jinejoto.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/203314110360d926fd77935.pdfIn PDF document text
    • http://garmagostaran.com/Upload/file/jusazifanelivumot.pdfIn PDF document text
    • http://www.wiz-fac.com/uploadImg/file/wawimewipeb.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aea9fe9cca---66241926498.pdfIn PDF document text
    • https://ctyhoanongangiang.com/userfiles/file/79485841072.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/77150d2fe5d00d20075acf9e826ac6f0/99916545656.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a92986667cc---50382424284.pdfIn PDF document text
    • http://orsini-blasioli.it/userfiles/files/mosidusug.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f7c84f1bd9---67421638136.pdfIn PDF document text
    • http://duquenne-moteurs.fr/webroot/upload/files/gizowinugakerefofaxivenoz.pdfIn PDF document text
    • https://bookatowncar.com/userfiles/file/21140055303.pdfIn PDF document text
    • http://np-laser.com/upload_fck/file/2021-7-3/20210703190236908485.pdfIn PDF document text
    • http://biosite.ru/images/news/file/kejir.pdfIn PDF document text
    • http://stainless-faucet.com/uploads/htmlupload/files/sirogojus.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c26124463f6---45794298269.pdfIn PDF document text
    • http://arablift.net/userfiles/file/59312094163.pdfIn PDF document text
    • http://alisawedding.com/upload/users/files/gedabedazibikojep.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/41556f5a815f036059bf16f33c72aa8a/9542536173.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/29413700301.pdfIn PDF document text
    • http://women-for-marriage.com/ckfinder/userfiles/files/lelanizo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=dka+treatment+guidelines+2018+adaPDF 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_off0000cb06.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB06 16792 bytes
font_01_sfnt_off0000e31d.bin
383852ef1e69e87222496f5b92231681b053cc7db3a5f13f014cb7e33043b936
pdf-font-stream PDF embedded font (sfnt) at offset 0xE31D 11168 bytes
font_02_sfnt_off0000fd1c.bin
2e5edae2dae7348a4e2abe0dcdc5ddcdacb472fbd9f5b49b0f745742089fb128
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1C 16592 bytes