Malicious PDF — malware analysis report

Static analysis result for SHA-256 56c23b96e54c4188…

MALICIOUS

PDF

102.7 KB Created: 2021-06-26 10:17:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: c9fff81217f7a24f06a7d3a72617e922 SHA-1: f24e9938fc9b46c7b0b8d9de31c56585d674b7fc SHA-256: 56c23b96e54c4188860b0802afbac8696ec6c8805efd388749a6fc7d890cfc65
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were directly extracted, the nature of the URLs and the detection as a trojan indicate a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

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 https://ajwatravel.com/wheelmarine/userfiles/file/zuvajamat.pdf In PDF document text
    • http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/15104881914.pdfIn PDF document text
    • http://biurod9.pl/public/userfiles/file/putotuponugu.pdfIn PDF document text
    • https://aspirans.com/files/file/87768546039.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/20786995303.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2a683a365---73175277457.pdfIn PDF document text
    • http://fitnessklub-impuls.pl/uploads/assets/file/37603187894.pdfIn PDF document text
    • http://aprendanow.com/wp-content/plugins/super-forms/uploads/php/files/2778a18efa04bf7bc60e43a511d87a82/tuxojogekimajivar.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/f3f14896be781c9bae709b339dae45f2/xemesake.pdfIn PDF document text
    • http://japan-railpass.info/images/blog//file/xexajalarabifej.pdfIn PDF document text
    • http://cesurmakina.com/userfiles/file/73451434476.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c05744db036---xojamidanukagijevosakoji.pdfIn PDF document text
    • http://zetrade.cz/userfiles/file/bafoposisagomori.pdfIn PDF document text
    • https://aihr-iadh.org/uploads/FCK_files/file/vavenoginazeri.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bc7425588d1---52001709831.pdfIn PDF document text
    • http://baugeraeteverleih.de/benutzerdateien/43440864111.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/t3idg6qvrj57cafjq9ll1kfafk/63800603977.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/c11ad4b0b4b376721cf839c0b3af3833/fulosojirezuferap.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021062217583683.pdfIn PDF document text
    • http://sisparts.pl/zdjecia/fck/file/lutanikikesorojebab.pdfIn PDF document text
    • https://lapalettedesarts.fr/gestion/file/ruwezitupebutudo.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/14394347069.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d424628461b---68530864189.pdfIn PDF document text
    • http://bukharasuwanee.com/sites/default/files/file/jumobitojifefetaj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=meaning+of+man+proposes+but+god+disposesPDF 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_off00012ecb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ECB 11028 bytes
SHA-256: 240a5feee597be0ff5f4e1257296454f7db552cd6aa158ce186c41cb0ccbe3d0
font_01_sfnt_off000147fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147FC 16944 bytes
SHA-256: 66ff39211eeae898b8d0259b0f13d3277c4a3ba0b7b9c71bb20cf159ff245c6a
font_02_sfnt_off0001739d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1739D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.