Malicious PDF — malware analysis report

Static analysis result for SHA-256 54ace6f062d31157…

MALICIOUS

PDF

94.5 KB Created: 2021-08-26 14:46:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 76316443f14be7ef4a5b87c9a531e9e6 SHA-1: 14bcbf0e6647cb0137e6f391d09c2b37ecfdb38a SHA-256: 54ace6f062d31157ea1cbcc94bb289dd102fb2e697400b002db6b202c0ec9e53
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. It contains numerous embedded URLs pointing to compromised WordPress sites and disposable hosting, likely serving as a link farm to redirect users to malicious content. The file's structure and embedded URIs suggest it is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://catamma.ru/uplcv?utm_term=odyssey+of+the+seas+itinerary PDF link annotation
    • https://digireg.cz/upload/walofasipasubiliti.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/fc47c58801af8418a184b1248361b7a9/73837781362.pdfIn PDF document text
    • https://rodolphe-blanchet.fr/Rodolphe/fckeditor/file/66236195126.pdfIn PDF document text
    • https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608042c6d6d75---70721357725.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160f598b19f552---wudikufejexuxodezoluz.pdfIn PDF document text
    • http://mesamiesdallas.org/clients/e/ee/ee8f1390623de39be1ac2b47a321719d/File/gipakekiner.pdfIn PDF document text
    • http://tuecpa.com/file_media/file_image/file/dajinorepozukup.pdfIn PDF document text
    • http://ore-processing.ru/d/files/zasinabebupinezom.pdfIn PDF document text
    • https://nada70.org/userfiles/file/31927284762.pdfIn PDF document text
    • http://vorne-sitzen.eu/pcms/content/file/91355883168.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160b7844cb8024---femijafu.pdfPDF link annotation
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160ac166e5e6a4---vujevorififilafat.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a46f41253e4---542914932.pdfIn PDF document text
    • http://fogathajtohirek.hu/fckfiles/file/17369969595.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/ia0rihu1fkiesidf3f6pgqn3te/47579145805.pdfIn PDF document text
    • https://martensmgt.com/business_school/uploads/file/82026916089.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/a2922f561972b20ced6d9ba8f7a5ef73/banuzepivomukuwizojakeki.pdfIn PDF document text
    • https://digireg.cz/upload/fulavi.pdfIn PDF document text
    • https://villamishkan.com/310renonew/front/images/files/71167453439.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/33837dfa6f1075db0f111de035dfb3f4/nizijojipegibunumuwigo.pdfIn PDF document text
    • http://studiomanzella.com/userfiles/files/8290264060.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1609b4a466740b---kisom.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/8daaa1ff285f1c1fd3a0246397cbe85c/5515605876.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1610bde9993de2---vusilomonuguze.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_off00011073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11073 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12885 16744 bytes
SHA-256: bd552a183a89c33ac1ab6133fed635cf2e5fbf4a17a72c1b21ea0bd82c93e05a
font_02_sfnt_off00015421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15421 10544 bytes
SHA-256: 30f7d6f6fe492ab64ba5c43b64857a585da0a5cdec3a005dd49db7d7ef777620