Malicious PDF — malware analysis report

Static analysis result for SHA-256 60896502d289cb1e…

MALICIOUS

PDF

87.1 KB Created: 2021-08-14 16:27:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: cd67e5ef158d955144f3fd9b096e2f42 SHA-1: d27362523ef96db6ca86347fc9e9e87054ae71ee SHA-256: 60896502d289cb1e7b21bb737f8f80798c1236f783299dc4465f009426ba276b
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing to multiple URLs, many of which are hosted on compromised CMS upload storage. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body is heavily obfuscated and appears to be non-readable content, reinforcing the focus on the embedded links as the primary attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • 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.
  • 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://jucal.es/images/file/waforiveduke.pdf In PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/m53bsc528mh68cauirfc97mggb/tesinipimijosibe.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/stbjd3095tmmc85hjfb242ckj1/27008013154.pdfIn PDF document text
    • http://dostrojar.sk/UserFiles/file/jiwufuvib.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/38338306279.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc91688ad1---sawofigexukudewotatid.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/c18deb4166e309224e9b5b0edd31a66e/19176216759.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/84616512237.pdfIn PDF document text
    • https://pmcp-avac.com/files/upload-ckfinder/files/lopazudifekiwo.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a945b2e6180---sotinuviwexonipovuwosur.pdfIn PDF document text
    • http://bodymindspiritconnection.org/clients/5/53/53f1eac0d8ee32431a47b4e1af774f29/File/68387504550.pdfIn PDF document text
    • https://decoveinvestment.com/userfiles/file/zofunakazasurumekekawites.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e63eeb02f99---89647953709.pdfIn PDF document text
    • http://rafaelstore.ru/upload/files/buworarixuxuvamuvofigori.pdfIn PDF document text
    • http://tieclangman.com/Images_upload/files/kotopoduvusewi.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/wudaxebagibufarazalidu.pdfIn PDF document text
    • https://warsztatgdynia.pl/app/webroot/media/files/dogadukesaxara.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/topupiwubefuvoxisuzotifi.pdfIn PDF document text
    • http://globalcenterhotels.com/bot/ckfinder/uf/files/43199641200.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a05800272---9275204900.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/bc3dc918654e6862f9de231248e0723e/zosakedewapofumokelere.pdfIn PDF document text
    • https://pachetedeturism.ro/images/files/jilafafakegatakodo.pdfIn PDF document text
    • http://greensketch.in/userfiles/file/limevefivez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=harry+potter+series+3+noble+collection+mystery+wand+storesPDF 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_off0000ed6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6E 11180 bytes
SHA-256: 4ef184ad249482ad4a5b58858e4635e5dec84ba3bce8f2675b78b1e01f6038aa
font_01_sfnt_off00010769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10769 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011f7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F7B 18092 bytes
SHA-256: 52bf2af3f8e75e2f388600fe696bc92d48b6deb84267a858e427cc12e5ec59a6