Malicious PDF — malware analysis report

Static analysis result for SHA-256 c45bf69029078f92…

MALICIOUS

PDF

70.8 KB Created: 2021-09-25 16:57:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: fd57455fabede4b34a806aef94585d9a SHA-1: b70d92eb1a1ba1e45a84498e0f28dd7a33b4168b SHA-256: c45bf69029078f924ef9152bad65ec57d94dee5fb95f7a4b2fb64bb29480500a
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a callback phishing or tech-support scam, as indicated by the 'SE_CALLBACK_LURE' heuristic. It contains numerous links to potentially compromised websites and disposable hosting, suggesting an attempt to distribute malicious content or redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • 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://nomylo.ru/uplcv?utm_term=top+ten+sniper+games+for+android PDF link annotation
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/m8ahifbrubba6emhv9orvq918j/56391483430.pdfIn PDF document text
    • http://haliburtonhighlandsheritage.ca/userfiles/file/71875113931.pdfIn PDF document text
    • https://jjcfurnituremaker.com/userfiles/files/21388481109.pdfIn PDF document text
    • https://goldmenu.com/userfiles/file/fikedog.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/81upvjgtug5ntkvcg01vdp4880/zepofutikul.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/e6d6fc235fce82708453f112694345cd/28357129827.pdfIn PDF document text
    • https://www.xyoaa.org/sites/default/files/files/fubakasotadovolegapuju.pdfIn PDF document text
    • http://avvocato-callegaro.it/public/file/52317294565.pdfIn PDF document text
    • http://fu-xin.tw/uploads/files/202109061409188531.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ce74079cd2---jezigurotibukutu.pdfIn PDF document text
    • http://finadev-groupe.com/userfiles/file/48348504910.pdfIn PDF document text
    • https://zenit-npk.ru/files/file/7021957872.pdfIn PDF document text
    • https://mediaget.ru/userfiles/files/53536412070.pdfIn PDF document text
    • http://enslev-anlaegsservice.dk/userfiles/file/piwideluteriradasini.pdfIn PDF document text
    • https://coastalstudio.com/images/main/file/73810830405.pdfIn PDF document text
    • https://egc.ecrom.work/syo/files/51776373421.pdfIn PDF document text
    • https://szamitogep-szerviz-javitas.hu/ckfinder/userfiles/files/89682282521.pdfIn PDF document text
    • https://mkontakt.com/dat/file/66133200255.pdfIn PDF document text
    • http://st-ark.it/userfiles/files/levevaviroxo.pdfIn PDF document text
    • https://hasekei.jp/userfiles/file/67560528310.pdfIn PDF document text
    • https://museuminiaturesbesalu.com/files/87124463472.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136ced21c375---32797258621.pdfIn PDF document text
    • http://mojahotels.com/ckfinder/userfiles/files/xiret.pdfIn PDF document text
    • http://krasneclanky.cz/uploads/91768296910.pdfIn PDF document text
    • 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_off0000b2dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2DD 10760 bytes
SHA-256: 4abfac6a97a34ca2c35c5b822242c0c28d45d513a3326a557da649e2f6d7b65a
font_01_sfnt_off0000cb66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB66 16672 bytes
SHA-256: b4820a8257a46477502f5eed70dff40cc4d6c8e6991de4f00863eb283aef21ff
font_02_sfnt_off0000f54b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF54B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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