Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb95ababf7464d42…

MALICIOUS

PDF

84.4 KB Created: 2021-06-26 02:57:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d7738db36cbfabff9d1d0b048ddbd9bf SHA-1: 68b77f0a72fc81e04d4fa3b547840339deca05d8 SHA-256: bb95ababf7464d4248b934194552d70e44f7c130edca39692247034ec450e7b8
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to compromised WordPress upload directories or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://clairerolo.com/userfiles/file/20285499250.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/8qfih675fb948flesgm7uljam1/gatajekipozijuji.pdf
    • http://orgue-chantepie.info/FCKeditor/upload/file/nixani.pdf
    • http://munnarinfo.in/userfiles/file/79375395526.pdf
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fea886add9---dasat.pdf
    • http://adabaskimerkezi.com/upload/file/nipakokijexerajepizap.pdf
    • https://lasvegasrebath.com/wp-content/plugins/super-forms/uploads/php/files/9466654d91f973d82e5243d5076d7db5/53491466020.pdf
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609467c3daea6---31187784114.pdf
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f583960284---ginefipugarev.pdf
    • https://taevlingar.se/images/pages/file/68181786962.pdf
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/7a0b3c9a597cb999dd17180db12c8eaa/14129265955.pdf
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/16095c6e9efdb4---11639979692.pdf
    • http://christschoolblr.in/userfiles/file/zexalubomojizo.pdf
    • http://betaempire.com/uploads/userfiles/file/file/26639744938.pdf
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/cf4fa4db33723d6092064a0b8c3f7c19/17212715397.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/lsiqv137lqbitdiag18it7o3m4/96250525039.pdf
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160815c518fdf7---terevedigepoguxet.pdf
    • http://bomtvplus.com/data/board/file/20210621033137.pdf
    • http://kursadowicz.pl/Upload/file/10024342935.pdf
    • http://gyobel.itpublic/file/fozivakokerixefovisabus.pdf
    • https://turkuazhost.com/calisma2/files/uploads/37201612107.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/0c1dfbf4c09025183d0b68e47a288141/19866113109.pdf
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/af9d2ece1f9756539ec0e1160ac2dd58/nomiziwewom.pdf
    • http://dahchen.tw/userfiles/files/92083217647.pdf
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/2as6idpd8ghruissrq0failr64/34828245035.pdf
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/6e9np8jnqr3cmn103hckthbk2g/jewidenuwakumiz.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=personality+color+yellow
    • 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_off0000e698.bin
4a00b55cd4e3e1405b9c19ae2d1fbf039f6f80d55b220bdee882937faa1add90
pdf-font-stream PDF embedded font (sfnt) at offset 0xE698 17000 bytes
font_01_sfnt_off0001130d.bin
a467b566ac12caa28fad12738a7c64c82e32eb16c764f39d98bddcdf49397a54
pdf-font-stream PDF embedded font (sfnt) at offset 0x1130D 10424 bytes
font_02_sfnt_off00012aed.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12AED 16792 bytes