Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f207ac2af6653d2…

MALICIOUS

PDF

81.1 KB Created: 2021-09-09 20:43:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 22db536a6d08ca6257c42163fd33dcdd SHA-1: 6c6ca1d7f247d6342ac9ac77baf7e877547349a7 SHA-256: 0f207ac2af6653d2f777048b84c9216f08624d52b4dd8db4ff93474af29c43bf
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to multiple compromised CMS upload storage locations, suggesting an attempt to distribute malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of a download button lure further supports the phishing or malware distribution objective.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://vanphongphampmc.com/upload/files/dodom.pdf In PDF document text
    • http://lg-palette.com/upload/files/61138291318.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f118e04c01---fogelepikefufomadugafu.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/161355dd391f49---tumenezipugiz.pdfIn PDF document text
    • http://addisonplaza.abwingsmd.com/uploads/files/41530423321.pdfIn PDF document text
    • https://ketex.com/trcgp/ckfinder/userfiles/files/bowobezedigoj.pdfIn PDF document text
    • https://www.rapn.ru/ckfinder/userfiles/files/67077791909.pdfIn PDF document text
    • http://maekuangudomthara.com/ckfinder/userfiles/files/nebuwaniramuw.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/3745487651.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/71779c5edf53e34e0d094a7f798ab02f/ruges.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161350c81d3508---bebuli.pdfIn PDF document text
    • https://sarenpinler.com/calisma2/files/uploads/64399028581.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16132b3a630aaa---35707156329.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/f52224254ddb42c23bf1d24c640b2fad/sogoremewirugixosiwib.pdfIn PDF document text
    • http://saltokisport.com/uploads/files/xopixusupibovonaleg.pdfIn PDF document text
    • http://design-klasse.de/ckfinder/userfiles/files/24136971483.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/5159033000e0bbca293e6c2ada857fcd/32271538760.pdfIn PDF document text
    • http://www.morrisjones.co.uk/EditorImages/file/wipadaxagivibo.pdfIn PDF document text
    • https://implant-drill.com/userfiles/file/63572921710.pdfIn PDF document text
    • http://bestapp4u.com/admin/uploadedfiles/file/borerujewogebefar.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/mujsodlfmcrhevtjvsqmonvem0/55750172598.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/16133f38fcc061---66141275898.pdfIn PDF document text
    • https://linker.tw/files/xupolafitizasamurojopud.pdfIn PDF document text
    • https://consurs.ro/ckfinder/userfiles/files/dadowevosejunonim.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=finding+spy+apps+on+androidPDF 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_off0000db80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB80 10380 bytes
SHA-256: 8b0163ac1227a46f373c7560c64864837ac86c45ece3f30f95871c52fc971670
font_01_sfnt_off0000f2cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010add.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ADD 17140 bytes
SHA-256: ac713927e9a68819b146d8396ded036ffe62955bfcb834eb2c8c8d000d886b52