Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fca0e482dd9b143…

MALICIOUS

PDF

85.8 KB Created: 2021-06-29 01:03:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ca5cf7f9f4fc4aac49b4965dbb42c07e SHA-1: 39c9f24888220cfb713201ca90ea4df90b7ec050 SHA-256: 9fca0e482dd9b143b4a0f151e1a383995d0610e87b879f5b69010563bc35f4b7
156 Risk Score

Malware Insights

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

The PDF contains a large number of links pointing to compromised WordPress sites, many of which are hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2e32db0c6---67629836643.pdf
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aada8354f0d---ripofutuje.pdf
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/f567cd5f28478005e3780424e95ca395/lomamubekapidubadipugodi.pdf
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16073bd417dfaf---43063722279.pdf
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af926981507---xapodetilamulaz.pdf
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2dd226b53d---gibifevawuxosajupexewabiz.pdf
    • http://aucoindeshalles.com/menu/file/sapenixakibuje.pdf
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/adcc7663f4571a61306eab2486057622/xirofowijolujixuje.pdf
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/i7nph28nicu770c1f3hhltjb40/wozulesivexizet.pdf
    • http://doggystylzgrooming.com/admin/photos/file/widomugeli.pdf
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1535ec4753---52828850186.pdf
    • https://tese.in/ckfinder/userfiles/files/savuledazugenesijotivave.pdf
    • https://caribemed.com/userfiles/file/welilojevux.pdf
    • https://elnativocoffee.com/silver/upload/files/pubovorazukositabanaxaxan.pdf
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/n6rckq6n7gt9dl6mnq5foif9i3/juxefodusurusitutugiz.pdf
    • http://salt17.com/userfiles/files/gajil.pdf
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b67df1caa1d---lorarezorivagifomubujise.pdf
    • http://upbfassadenbau.com/upload/file/66617829918.pdf
    • http://seventyfirstclassof69.com/clients/60772/File/29419035054.pdf
    • http://anhuizhkj.com/upload_fck/file/2021-6-12/20210612052812998896.pdf
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/16093ad6884690---33810706359.pdf
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a35c138ec2e---dexalibuwixafudoxalegopug.pdf
    • https://everywheregenes.com/uploadfile/qu26_qu106_com/files/tifunoduvij.pdf
    • http://lakehighlandsrw.org/clients/863582/File/burodedovixojut.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=debut+video+capture+software+free
    • 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_off0000eb2b.bin
55ac736655f3133853e9b828b2ac898e3c96fa31d3bf3374b61a151b181bac41
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2B 17508 bytes
font_01_sfnt_off00011891.bin
136c1c53319fec8a8f5fb8a78079a83707c7fcbbc27bc56bca0c7672a91aa329
pdf-font-stream PDF embedded font (sfnt) at offset 0x11891 10856 bytes
font_02_sfnt_off000131a8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x131A8 16792 bytes