Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae8d5d1aa31a597f…

MALICIOUS

PDF

87.0 KB Created: 2021-07-25 15:10:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5fee0db819fb4922fd96297e8722f02f SHA-1: b592f55d291309b3db18e60af8a32e2669199f45 SHA-256: ae8d5d1aa31a597f3a65654c4b5e2631e4792aab8c3c21c13c490e51bd7a8580
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV detection as a phishing trojan. It functions as a link farm, with numerous embedded URLs pointing to potentially compromised websites or disposable hosting, suggesting an attempt to lure users to malicious content. The file's structure and embedded links are indicative of a phishing or credential harvesting campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://playbabydoll.com/userfiles/file/78693132130.pdf
    • https://semsaesp.com/ckfinder/userfiles/files/81318727569.pdf
    • http://cartolmania.it/file/lixadukomifijuxesipulifa.pdf
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/usmn8kipeuqcaeftlakr8mcep0/5248619124.pdf
    • http://www.alexgis.com/siteuploads/editorimg/file/lanuxexarekejabaroxejiw.pdf
    • http://tcurryproperties.com/konadnew/userfiles/file/4194214097.pdf
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/vo89hq7v9lspql6avcbk7fjnnb/jamuvuparumitupon.pdf
    • http://gonuldoviz.com/upload/ckfinder/files/34681601774.pdf
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071b85d46d87---29068869590.pdf
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160aadc59c3af8---20320428643.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/ecqh41c2t2590cqa573hid7m69/93903198936.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bfdaec2b6c---josasidonagilikufowex.pdf
    • https://scriptdd.com/_file/file/55253731482.pdf
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/144h1b9fthf9q4ppkaf2552jpg/teworunikibapibujumider.pdf
    • https://trade.inter-ural.ru/ckfinder/userfiles/files/kapiwe.pdf
    • http://etabetasurvey.com/userfiles/files/61941640387.pdf
    • http://libertyquad72.fr/userfiles/file/jabajarozotokopupasurexu.pdf
    • http://ingfrimale.com/userfiles/files/85593204844.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/eascejepsn1btmkucuh9u1m2ut/ranuxulujedega.pdf
    • https://pelicanfinancialnetwork.com/ckfinder/userfiles/files/31256843513.pdf
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/a25cfcca96728a1aec91d8867e6c4ed7/11543462772.pdf
    • http://purifoy2020.com/clients/1/11/118d8b7ee1ea4bab8fb19da95c56260f/File/73115301445.pdf
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/4f102b2ee01bb7125c3130a71adb8f46/45195627417.pdf
    • http://elementsgogreen.com/userfiles/file/43246302398.pdf
    • https://sogelec-eng.com/files/ckfinder/files/rajuvufabanobajikoxov.pdf
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/sc8ogce95s6d66a0mbqr54c5a2/rexonawujupakegakegufaxo.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=formulas+de+lanzamiento+vertical+hacia+arriba+altura+maxima
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea0f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0F 16792 bytes
font_01_sfnt_off00010226.bin
dfcd7987ac9f132fa9d1a4b797c6749798363fbaaedf35a58d3ae642528c1262
pdf-font-stream PDF embedded font (sfnt) at offset 0x10226 11080 bytes
font_02_sfnt_off00011bcd.bin
bc5113b517cec2dc3e33003ebdc9106a99b2ea3b62133a5a854da700f630db90
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BCD 18504 bytes