Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e8d54dfa43d8e29…

MALICIOUS

PDF

83.9 KB Created: 2021-08-26 02:03:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8c1aed7a6f3669caf8c1daf26e642800 SHA-1: d46299db7e998cad6605190c01e7cf55ed5a0cce SHA-256: 9e8d54dfa43d8e29e0885a948cb64e49630c51372ace3fd24e5a20ca773bfe3d
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, pointing to multiple compromised CMS upload directories and disposable hosting sites. These links likely serve as redirects to further malicious content, such as phishing pages or malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://landtop.com/filespath/files/20210806215622.pdf In PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160716d7d5557d---29097053778.pdfIn PDF document text
    • https://urbanlivin.lu/userfiles/files/pukuzeliv.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/8f325efdd14e506a3f1b70be39cd2ef8/bujupufupaji.pdfIn PDF document text
    • http://maroba-zirndorf.de/file/dowiletozo.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/ekku8s2e63aqnoirk2o3ntl7o0/jebovafola.pdfIn PDF document text
    • http://szguilong.com/userfiles/files/xugamujudumonaloj.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/l6naqlucb8t55eptp67klroh5j/tazisudazukiditegi.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607293445eba0---ripezugalomopane.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/36b2f6c2c5b6dada504bf9f3cf5d01ed/pemibopujepufexad.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160babb52475fb---55001259414.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/96f78550d67b1ad99a2e2709ce79fb4f/koboki.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/9448a419dff04b6420dde54690f440b7/fonozapuweropizaburox.pdfIn PDF document text
    • http://premiercontractinginc.com/files/file/59140077816.pdfIn PDF document text
    • http://rtm-plus.com/ckfinder/userfiles/files/33479713907.pdfIn PDF document text
    • http://mpti.ru/userfiles/file/jirom.pdfIn PDF document text
    • http://calisnt.com/uploads/files/12339529936.pdfIn PDF document text
    • http://giaydantuongphongkhach.net/images/news/file/databilekarabelu.pdfIn PDF document text
    • http://www.heksan.com.pl/file/75421326057.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f80e65d824b9e88a87de56ccb5a535ce/kowazatuxudesadajop.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160767ddd88cd8---65830672564.pdfIn PDF document text
    • http://cariboohose.com/userfiles/file/90393040265.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/bc344dfa1a0fe1d706ca1bbe5758cdac/tofuvumukewux.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3bcfd18a94---xoxadabodowufaropukeg.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/0183e05714a5cc7a98723636ba5b66e2/kafovalawizugajumibob.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=project+on+principles+of+management+by+henri+fayol+for+class+12PDF link annotation
    • 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_off0000e206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE206 16876 bytes
SHA-256: 41f6be3387c8db96be4b5f2aa670bd2903c41a957bb934b007e971b466829d33
font_01_sfnt_off00010dfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DFB 11484 bytes
SHA-256: f417f691e786d091787a8126b8e7ece70050d3ad4fe39d9af7e2a269d9e43ea0
font_02_sfnt_off000128d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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