Malicious PDF — malware analysis report

Static analysis result for SHA-256 86303442fe8ab3d2…

MALICIOUS

PDF

84.0 KB Created: 2021-08-19 05:26:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 74cf9c3c8fd5c7fdbeb33d1561b29f5a SHA-1: 826ee4c93849369100a46127d5236ee3447e723f SHA-256: 86303442fe8ab3d2da8636ac7fbbf2196061d009dd3422bd4e0e78ba966401d0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farm heuristics indicates an attempt to lure users to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 https://garglob.ru/uplcv?utm_term=free+fire+mod+menu+hack+apk+%2B+obb+v1.49.0+unlimited+diamonds PDF link annotation
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b2aa97e52---panixojamaramij.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/731q9872p3dd8bojao0ek3urb4/66449925753.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd544a504bf---tinusuxezunikepefasuworum.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095cdccb5e31---pibuzoxuwovetifexoli.pdfIn PDF document text
    • http://gd-weimi.com/upfolder/e/files/20210611215714.pdfIn PDF document text
    • http://vizcsap.hu/files/file/37534213224.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/316625b338867e5cc2a7c21d3fb52d00/jonusizozadosaja.pdfIn PDF document text
    • https://bednidhitraders.com/userfiles/file/47524851710.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/8ffe71b0b084eb57604573c4163fca6e/fosenaletusoxakubuletido.pdfIn PDF document text
    • http://fence-alarm.com/userfiles/files/nanajamivawo.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608687e22fdac---bokusutuzunapuwijero.pdfIn PDF document text
    • http://chiangmai-clean.com/user_img/files/suvakexawetumaw.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160c888db68e7a---tukudovetof.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe74759f88---jamuzovanopodaxoto.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160c9ef6519d34---94731892571.pdfIn PDF document text
    • https://pametnidom.hr/pametne_kuce/userfiles/file/54957848522.pdfIn PDF document text
    • http://zge-led.com/luodan/images/userfiles/file/fefiwejapevixapate.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/a03cbee0eef6a4b2963901fa8f185d7e/mekemepunutuwep.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/6c39c2664e87654803892f7cff1b27ea/54230290063.pdfIn PDF document text
    • http://metabolit-plus.ru/files/file/19566463202.pdfIn PDF document text
    • http://carzip.biz/files/uploads/files/kawuxitumurowabapodem.pdfIn PDF document text
    • http://ashioke.com/images/library/File/tomagonurebalatonosaj.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/59545864840.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_off0000ddcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDCD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f5e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E4 11744 bytes
SHA-256: 31f0f3b2c026a1a5c9eff327dae5b97d080deb388b26c7a1f8e0857331d566c7
font_02_sfnt_off0001118e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1118E 17536 bytes
SHA-256: f76fdadcf6649e70f0dbfa272b9d0f94760b589b839de64440fe12c2da4cbbe4

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