Malicious PDF — malware analysis report

Static analysis result for SHA-256 e154d81a97eeb11b…

MALICIOUS

PDF

81.8 KB Created: 2021-06-25 23:49:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5dc6f58fef451441f5de644c46c9e357 SHA-1: 53fa69af13e594335669b7929e390367293a4d71 SHA-256: e154d81a97eeb11b4831c5b7872c4a1452f06ec280e2016d373bec41f632f283
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious. It functions as a link farm, containing numerous URLs pointing to compromised CMS upload directories. These links likely lead to phishing pages or further malware downloads, indicating a malicious intent to redirect users to untrusted content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://okinawa4d.com/contents//files/zotebumuwelevifuzamim.pdf
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1608919631b3f7---19646887199.pdf
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/f077ca6bb6705156cd0cafbc1f8dc9d4/fijutogupuzuruf.pdf
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e60c5b1f19---kutopoxilagugefumamazanos.pdf
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077d8d4b2c3a---17048843414.pdf
    • http://eastendmediation.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/47499487469.pdf
    • http://lateonsettay-sachs.org/userfiles/file/23027359465.pdf
    • http://yakutiaprime.ru/SITE/files/editor/file/16199510857.pdf
    • http://cuatro-pr.org/sites/default/files/file/duzosoruvigojovu.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/c9b4e3c75dc0895f9ee305a6031d2910/fabik.pdf
    • http://www.deep2001.com/images/library/File/kevirumosuxakab.pdf
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bd66126c84c---mirufatib.pdf
    • http://abroadster.com/files/xamuwip.pdf
    • http://accessiblevehicleservices.com/userfiles/file/xululuwapuwipakodezup.pdf
    • http://daedukgs.com/admin/fckeditor/data/file/20210606222833.pdf
    • http://hz-karavany.cz/ckfinder/userfiles/files/77279206448.pdf
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/kgpav6g55pncf41c0cc94aacs2/rafejuwiwusenevutufape.pdf
    • https://nhachoxebus.com/upload/fck/file/56360512424.pdf
    • https://annjulieskarpmo.com/userfiles/file/29587183407.pdf
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/em907rlha4p9jjs8h2i7b24s6c/zoxokoxitutu.pdf
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/rcdc4sqhao5uu1nm0rku3meihe/lefoxupu.pdf
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/c6c82b4c359d9cddf2c513d45c062437/47345148645.pdf
    • http://turhantur.com/turhantur/files/46166003767.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=trig+sum+to+product
    • 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_off0000db91.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB91 16792 bytes
font_01_sfnt_off0000f3a3.bin
0c7140ac521abefd51fff71d4c8449e2c4198bfac8e31d81337d704a772dbc72
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A3 17592 bytes
font_02_sfnt_off00012101.bin
b2304f4640ffb41bbc03ae5b5bd718145279c28ca24d41540b704361026d793f
pdf-font-stream PDF embedded font (sfnt) at offset 0x12101 10476 bytes