Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb69224501d5549c…

MALICIOUS

PDF

81.2 KB Created: 2021-09-06 16:03:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9a21dc5ab022d52ee26b63187ccc0942 SHA-1: 4c86a53da001cd104e8ff9949974c4b46633122e SHA-256: bb69224501d5549c72e4d16aafb0851113b03f820271baf475643a9b0f27f8e2
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple URLs, some of which point to compromised WordPress sites, suggesting an attempt to host malicious content. The 'SE_CALLBACK_LURE' heuristic indicates the document is designed to trick users into calling a phone number, a common tactic in phishing and tech-support scams. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 8

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://alarmy-kamery24.pl/userfiles/file/7097330389.pdf In PDF document text
    • https://ladangmimpi.com/contents//files/xelasakerepokiwab.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/f0b3033b570cb150d10c223d42133017/47884491732.pdfIn PDF document text
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/862b94258c65cabd7618f1db5bbdb522/laduvixep.pdfIn PDF document text
    • http://vtvxm.vn/userfiles/file/98762553327.pdfIn PDF document text
    • http://armanetti.com/images/gafipinejuvukukoxov.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f67cb6d067---4741289909.pdfIn PDF document text
    • http://tydafa.com/dafa/uploadfiles/20210821163659.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/6554feef10479813bf6afefa18495e58/zudowomitoreronarek.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/vofupugeredobin.pdfIn PDF document text
    • http://1137.jp/app/webroot/js/ckfinder/userfiles/files/22874585462.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160aebf94d4499---magavifarur.pdfIn PDF document text
    • http://dobre-jaja.com/Upload/file/topudikonub.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/semas.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16094e363bd152---5616716741.pdfIn PDF document text
    • http://jikaramen.com/uploads/files/meriposemixusuzukulovi.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/7055943002.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1610cf3b74617f---72354951079.pdfIn PDF document text
    • http://itfkarnataka.com/cvsprojects/SSK/Source/2.0.0/images/files/35014215831.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089282c6058d---98625111368.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/gakikuw.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c96955beeb0---20342974726.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b6f541080---34093973231.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/nf657s7o3us17sb3do0vf67jj1/rafixezojinu.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160930ffc9e245---30050430007.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=night+owl+1080p+dvr+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_off0000d63f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD63F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE56 11148 bytes
SHA-256: 406819ca92fb5a8747c1d55d3f7f5a250128498caa7e1092e865249b9eaca6d8
font_02_sfnt_off0001080c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1080C 18132 bytes
SHA-256: d569204768eecb1b1bcceeeb17f057b1456020334bb99d93158378c278ab1b86

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