Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f68c63ddc0bc177…

MALICIOUS

PDF

86.8 KB Created: 2021-09-01 01:57:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 306c12ef0fc5aed9e084700b6eb2ec32 SHA-1: c536ad848c200121ad15925dcdc31d57691354e1 SHA-256: 6f68c63ddc0bc17718b469fdbd5b7e2513ca208066b93535410113ae6c78b55b
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to potentially compromised WordPress sites and using disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the structure and embedded URLs suggest it's designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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
  • 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 http://www.bandungmesin.com/file/givezakodofupatodi.pdf In PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/46eca4b8bf69427ebb1cec615fa6a53d/34992421968.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fcb5cab6829---59872830521.pdfIn PDF document text
    • http://b-solutions.net/userfiles/file/leluwogewovomozib.pdfIn PDF document text
    • https://kaimano.it/file/xarijij.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c42a2e107fa---50525042194.pdfIn PDF document text
    • http://winfielddeli.com/ckfinder/userfiles/files/72497858293.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609e8146633f0---xeminisugixosigusu.pdfIn PDF document text
    • https://chsins.tw/uploads/files/202108140420469936.pdfIn PDF document text
    • https://ahl2005.com/ckfinder/userfiles/files/3819172447.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ab69c98e7---sogalo.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/ziwotisosijenifuda.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1612a9768c3ca4---4904157913.pdfPDF link annotation
    • http://chinamakina.com/userfiles/file/patoramafaroze.pdfIn PDF document text
    • http://wskinbody.com/data/boardData/files/lenepasusog.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/c3be36d5c6dadc98a6ba180913576ac5/6683149238.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a99ca74b38e---damanurolezodozi.pdfIn PDF document text
    • http://nutranghongngoc.com/media/ftp/file/potun.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/4sia0qi62sflvrv2pmb6gtsakg/11728658261.pdfIn PDF document text
    • http://learnersdigest.org/userfiles/file/ximetexev.pdfIn PDF document text
    • http://xlsferrosilicon.com/d/files/suxolunodedugileb.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/16080610234868---91270082776.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb8a0c6762---rutufixuladulebaw.pdfIn PDF document text
    • https://semsaesp.com/ckfinder/userfiles/files/84401663161.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160e382140b909---divirusivu.pdfIn PDF document text
    • https://finances-canada.com/wp-content/plugins/super-forms/uploads/php/files/ce7782cdc4de5ae4f50e05beb0ca3165/35559658702.pdfIn PDF document text
    • http://coutleelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wusilesasakatiki.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=is+reading+a+good+habitPDF 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_off0000efc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC0 17672 bytes
SHA-256: 738ecc3ecd8d38a07dbf0b5d69d2bb7539d9a70a2b4c20b843765ba9b85e12b4
font_01_sfnt_off00011daa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DAA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000135c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135C1 10572 bytes
SHA-256: 57b7b0b6cf55e977a86f3100c38a8bc929204e0a3537b138ffa544f0c30bab92

Open this report in the interactive analyzer, or submit your own file for analysis.