Malicious PDF — malware analysis report

Static analysis result for SHA-256 02396b2d94ec52a2…

MALICIOUS

PDF

86.1 KB Created: 2021-08-18 11:01:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fdeee31f6e5ea417460a469a4bc9970a SHA-1: 337f2e5d566bdd1f445a7ef57266ac714d39f88e SHA-256: 02396b2d94ec52a2ffa73ddb36b4494a7b157577d1add9ca1da05d070dfc41c3
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised websites, likely to distribute further malware or facilitate phishing attacks. The document body is heavily obfuscated and unreadable, suggesting an attempt to hide its true purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3fe132d991---rupurakukif.pdf
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8a93c123d---90146628985.pdf
    • http://sentezetutmerkezi.com/upload/ckfinder/files/28396872738.pdf
    • http://donaldnathanlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/59776808675.pdf
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160afd1ac5ac6a---27399877298.pdf
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160add458e57d5---bebinigunemonote.pdf
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/96b370dd4a1417feca2f462a66149df9/54962225281.pdf
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/egpqfpt41tuak6lchk8k9ck0sd/15403203535.pdf
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160d5cae7b0852---jolavigiberotobajuzafuxoz.pdf
    • https://rhuyscampingcar.fr/images/files/45510067516.pdf
    • http://shinies.ru/img/lib/file/tatufojaxanewuma.pdf
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160882be1c7b96---dipazoperutakaba.pdf
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/o3fjnlv582f8ch9h4plprms2ck/fixojotirunesizur.pdf
    • http://xn--80aguejfegacgj0ad.xn--p1ai/pict/file/69104139226.pdf
    • http://a-kamen.com/userfiles/file/ninumugotaxukexasex.pdf
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609420bf3f9aa---33051169908.pdf
    • https://accuratesearch.com/userfiles/file/55963381401.pdf
    • http://staropolski.net/Upload/file/9172243003.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/9skdfafggmg08ohddpmpur6hj6/59559372568.pdf
    • https://holocaustresearch.pl/nowy/photo/file/83797257994.pdf
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/l4n1m5mruf7ehdb5fvdsrku0ru/jolonanimana.pdf
    • http://abnicum.com/files/file/44597192945.pdf
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/u6lsgs9v66frck3f2fjl8hmamg/jumukagoz.pdf
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beb101c7ffc---651727529.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=bible+story+in+tamil+free+download
    • 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_off0000e878.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE878 16792 bytes
font_01_sfnt_off0001008a.bin
097477f204e92f168012534b80cdd7e02c4a21555f79edbde7188c40d7d0c877
pdf-font-stream PDF embedded font (sfnt) at offset 0x1008A 18804 bytes
font_02_sfnt_off00012fe6.bin
c67b0e83aa6d24cb0ecd04b630754c7089395ae3979cc5e37cfd2ebc85dd69b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x12FE6 10908 bytes