Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaf0af527bfdeccb…

MALICIOUS

PDF

92.3 KB Created: 2021-07-15 14:24:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b416d6790f638d29791a9c5ea46a536c SHA-1: 7fc9b758303f46ebacffe5a0272fd888f1e10a20 SHA-256: eaf0af527bfdeccb0b2c3f7ba54c2417810b112c1c659751008eadc68bf6864e
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 links pointing to compromised WordPress installations and disposable hosting, suggesting a phishing or malware distribution campaign. The presence of external URIs and link farms indicates an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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 https://crysiq.ru/uplcv?utm_term=5+examples+of+count+nouns
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac434072f62---71842567122.pdf
    • https://an-professional.ru/img/files/file/19648317561.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/us7sl865pi0va6hkog64qn4qf2/pulexorogamowigul.pdf
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7530fa3c0c---fupuduzevizedowikogi.pdf
    • http://sladkiy-ostrov.ru/userfiles/files/nasesapumakeguveviso.pdf
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/e784c75aea87ab7082f3aa0e13ec3620/xibufovupiwizobanex.pdf
    • https://hissekurban.com/resimler/files/mamikuda.pdf
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160771e19ce998---funolobamatofirelurog.pdf
    • http://babamoleskine.com/files/file/xelenafunemimalunoles.pdf
    • http://10glazsikeyrosa.ru/file/62530479792.pdf
    • http://jmdfhjl.com/fckeditor/userimages/file/suzipukido.pdf
    • https://comfortinnbarrie.com/phpsites/vertical_living/uploads/file/rawuzezetujijakozavozu.pdf
    • https://inverpalmas.com/aym_image/files/42652494988.pdf
    • https://adepotcustom.com/UploadFiles/file/20210501183628158.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16089e52e426c3---65605273589.pdf
    • http://xn--90aoj0agf7cq.xn--p1ai/uploads/files/xipexijumisikizolipavurim.pdf
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/nb5pdbnphnknd0b0rtb1v60ju2/wovejide.pdf
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/1660fcb2f992f426d0c603c96a0517f2/dasumafegaxifejubijawas.pdf
    • https://giovannicaputoboutique.com/file/86908396509.pdf
    • http://www.aadhar-interior.com/userfiles/file/wepujuwulunavuwozi.pdf
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a517f53348f---75453138661.pdf
    • https://uleiuri.ro/userfiles/file/rivagotopuwetirerew.pdf
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0813075399---todexufidokoxofix.pdf
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b467e14938d---zefigituroredixu.pdf
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e04b.bin
9a6c7bf6bc2237ff05ef3e30b51a572031ba465238f5159dcd94c53bef6800a9
pdf-font-stream PDF embedded font (sfnt) at offset 0xE04B 2096 bytes
font_01_sfnt_off0000e9cf.bin
0ab64918e43745ee7f42c2162ed1d297facdd9f0bd3a8f7e4bf61234510f9f71
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CF 20440 bytes
font_02_sfnt_off00011af3.bin
53201bf6a5c81f2331939d33c003229a68bc8ac81de5136d36f478e6e7a0871a
pdf-font-stream PDF embedded font (sfnt) at offset 0x11AF3 10688 bytes
font_03_sfnt_off00013390.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13390 16792 bytes
font_04_sfnt_off00014ba1.bin
8214b55e030c3cb37d727e4c02e4f9fe3cb7b8fc3885df20e34cb8ea79a6e3ab
pdf-font-stream PDF embedded font (sfnt) at offset 0x14BA1 16172 bytes