Malicious PDF — malware analysis report

Static analysis result for SHA-256 97df6ed6e53d714b…

MALICIOUS

PDF

83.8 KB Created: 2021-08-16 20:46:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8fa11b8ac0574c61dee7c7eedd035378 SHA-1: 2dbd9db6d1ec343f6b4fe7e0c321d1fd0baf8c7a SHA-256: 97df6ed6e53d714bc4410c50373fc932c7ded0f1868f467c7699dcfad087c630
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and a machine learning model. It contains numerous embedded URLs, many pointing to compromised WordPress sites or IP addresses, suggesting a link farm designed to redirect users to malicious content. The presence of these URLs and the overall structure indicate a phishing or malware distribution attempt.

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 https://crewmak.ru/uplcv?utm_term=descargar+biblia+reina+valera+1960+para+pc+windows+8.1 PDF link annotation
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16103f5ea2def2---tukipekekuvugevurosopeza.pdfPDF link annotation
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb1fd303de---vukedenezapuwu.pdfIn PDF document text
    • https://chv.vn/userfiles/file/dobamaxategexegukerafujan.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16085251621da8---90870779087.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/4f8fab27008c23ad52ad65143374ba97/23244919558.pdfIn PDF document text
    • https://hoakhanh.vn/uploads/image/files/70266815973.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/432523450a2e6376958fd214346fa433/jorekud.pdfIn PDF document text
    • http://ttc-investco.com/img/files/9065853361.pdfIn PDF document text
    • http://aostavet.it/userfiles/files/70944682723.pdfIn PDF document text
    • http://anapharmata.hu/ckfinder/core/connector/php/files/lutadisila.pdfIn PDF document text
    • http://thedreams.cz/files/dilaminozadim.pdfIn PDF document text
    • http://hwayinn.com/image/files/20210607_065907.pdfIn PDF document text
    • http://lindendirect.com/ckfinder/userfiles/files/xanuzazovegavegitofexop.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/cc670631cb5279750b99978e9ba36122/vafiralomawubenon.pdfIn PDF document text
    • http://dongshengcable.com/images/upload/File/keriwobudosozabovenebiweg.pdfIn PDF document text
    • https://cristalparkhotel.com/ckfinder/userfiles/files/52621655568.pdfIn PDF document text
    • http://stensoproject.com/userfiles/files/vorizuwuzir.pdfIn PDF document text
    • http://www.radanhorse.com/resource/files/3767759831.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160898dbd419bd---80194269697.pdfIn PDF document text
    • http://mobilenmr.com/files/files/dujegomifubuxizerumox.pdfIn PDF document text
    • http://purepassion.pl/userfiles/file/63199174764.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/8627129d8c5d206fa4100a2bdc19663a/nujoxumuwigazomoluxugi.pdfIn PDF document text
    • http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1dc8a790f---44232623368.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/10524230186.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/eef028e22f1fb4e662e97623d58f4ec6/badeloromabarimogamon.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607db1b42d236---gelekonebabuz.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c56c50e3d09---tejuzixetopodix.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_off0000de27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE27 17776 bytes
SHA-256: fdeb783735a00ee46342a5056d98c1c40899bf80bbdbf398b47d1e358d0bf333
font_01_sfnt_off00010b72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B72 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012389.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12389 11668 bytes
SHA-256: ef16de105805c5d0409dc57e3761443704cc9aafbcfbbb3be5393f3cb00c566e

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