Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ef655323f58f47e…

MALICIOUS

PDF

83.3 KB Created: 2021-09-20 00:56:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: fca311e571f347c61e60166776aa2589 SHA-1: 24ffa28addc489c20ecaf141f2c0eb0b2db2ae63 SHA-256: 1ef655323f58f47e75e5830bde13f07e321c0b25eb195f4a9d2c1f03b9428e71
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1071.001 Web Protocols

This PDF document exhibits characteristics of a phishing and callback scam. It contains numerous links to external websites, some of which are hosted on compromised CMS platforms or disposable hosting, suggesting an attempt to redirect users to malicious content. The 'SE_CALLBACK_LURE' heuristic indicates the document prompts users to call a phone number, a common tactic in tech-support scams or billing fraud lures. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the exploitation of PDF vulnerabilities to execute further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://huntic.ru/uplcv?utm_term=gta+vice+city+stories+android+apk+download PDF link annotation
    • http://hotelbellevuepalermo.com/userfiles/files/jexijipevajidofokukav.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/161379e97d89ca---dimux.pdfIn PDF document text
    • http://fitviewer.com/files/file/82717583418.pdfIn PDF document text
    • https://manpowernepal.net/ckfinder/userfiles/files/pokatozibosifoxuworux.pdfIn PDF document text
    • http://jadever.vn/Images_upload/files/zavezusutukeginibafik.pdfIn PDF document text
    • https://roshnaai.com/ckfinder/userfiles/files/bokazidaruximibaxidogutuj.pdfIn PDF document text
    • http://pitchdecor-construction.com/user_img/files/xawas.pdfIn PDF document text
    • http://vitalenzyme.com/uploads/fckupload/file/4208951348.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/vorox.pdfIn PDF document text
    • http://thienlongadv.com/upload/files/viritilob.pdfIn PDF document text
    • http://thegioimercedes.com/upload/files/venugoripuwabubunesu.pdfIn PDF document text
    • https://hahapediatric.com/uploads/files/202109032210046515.pdfIn PDF document text
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/taravodazogomipinojap.pdfIn PDF document text
    • http://monteconsultants.com/image/upload/File/juvalefatugenaxotovepidoj.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ef6fa6850d32b0305220cd70a621ed56/44547421211.pdfIn PDF document text
    • http://kingsbrite.com/kingsbrite.com/userfiles/file/xewusunokaponola.pdfIn PDF document text
    • https://98ing.com/upload/ck/files/20210913_233427.pdfIn PDF document text
    • http://arcadia-fitness.es/userfiles/file/13167714662.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/7a2e96722c61e3e0050d711c1f608841/suvasenefaledol.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/161463bfc5f160---49713159635.pdfIn PDF document text
    • https://onderdurdu.com/upload/ckfinder/files/58348725201.pdfIn PDF document text
    • https://ezastupitelstvo.sk/editor_uploads/system/files/zefewumemirafafo.pdfIn PDF document text
    • http://ototavandosemesi.com/resimler/file/69374951199.pdfIn PDF document text
    • https://theelementrama9.com/userfiles/files/85556326680.pdfIn PDF document text
    • http://kondicionery-fryazino.ru/upload_picture/file/vazotumifapegug.pdfIn PDF document text
    • http://xdata.pl/app/webroot/img/ckf/files/dunogatofujubikut.pdfIn PDF document text
    • http://miskolciharsona.hu/pictures/file/kekajetutasiwis.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_off0000df93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF93 10904 bytes
SHA-256: 3d312c1b9d1c8bf9d5dca766203f2cfad8668b0bdf4455690dfbe70c45287368
font_01_sfnt_off0000f914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF914 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11126 17808 bytes
SHA-256: 77b15f5f995f08480319ae6c77d57754ab9b0864a962f5187396db4bb820434e

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