Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fe07dadb9f49c72…

MALICIOUS

PDF

84.1 KB Created: 2021-09-01 18:21:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 4cba8813c013b80d4e02fca318721531 SHA-1: baae0cd93c2f2422aee7f1fdcf35f0333a56082a SHA-256: 2fe07dadb9f49c722ee3a1c95a96333534515e150f5352326526802c45690df1
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The 'SE_CALLBACK_LURE' heuristic indicates the document's content is designed to trick users into calling a phone number, a common tactic in tech-support scams and callback phishing. The presence of numerous links to potentially compromised CMS upload storage further supports a malicious intent, likely to host or redirect to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da399886d51---15961862856.pdf In PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/2e86esnj1lafu1tklna6ar0lc3/newexabimigabu.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/tusarajebowoveguva.pdfIn PDF document text
    • http://isvpro.com/custom/files/29368562264.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/37c5ae236a199528ccbc52af4a58b56b/vadarigajibelex.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/vebekijunuze.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/b8c02339f82fd3b0fc73bed5419878fa/62417281610.pdfIn PDF document text
    • http://alanurturizm.com/rsm/files/gezoledadolin.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/ddf5e4a7875737cba47c0a4cdd73ddf7/zegexizadesajuzusiloduro.pdfIn PDF document text
    • https://haysalon.com/public_html/userfiles/file/waretovifetetubiwuf.pdfIn PDF document text
    • http://reversetheclocknow.com/ckfinder/userfiles/files/90723198405.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/budikiza.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb004b11cb---68854548840.pdfIn PDF document text
    • http://dongphuctqueen.com/upload/files/74146271216.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/d8ac68f47c15140280dc974ef1f0e8c2/lavobapupijulegupapasisu.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/7d698ae6612f460a1e34676b63f667bd/93788177406.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608efef545f28---guripejinopavozivujub.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160755f083106c---72380586798.pdfIn PDF document text
    • http://senseoftourism.dk/userfiles/file/41510677688.pdfIn PDF document text
    • http://chongthamnguoc.vn/img/files/88223690221.pdfIn PDF document text
    • http://bigsvatcharasith.com/userfiles/file/23329712923.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/561918d1d169192de1998d36342fc3f2/posafenop.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=young+champions+cheerPDF 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_off0000e10e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE10E 10760 bytes
SHA-256: efa03929da6f5d6c668a63abf5d0ae9094ea2c1096f617279610a2f954dec74f
font_01_sfnt_off0000f998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF998 18308 bytes
SHA-256: b6963314e24db7d03b43a2d0e663e1dd4e95e99ed77ea3b96dbdbb96c700fef6
font_02_sfnt_off000128d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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