Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcce2a6094e5063e…

MALICIOUS

PDF

73.6 KB Created: 2021-09-03 00:58:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d5627c3eb85e19aeec222c7a45a493c7 SHA-1: cf1a387d965e4e75881670d419f886583f31cdb2 SHA-256: fcce2a6094e5063e369b6ea8f98f4bd78db8049eac1f7c3a32546b942a78c007
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS platforms or disposable domains. The embedded URLs suggest an attempt to lead users to malicious content or phishing sites.

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 http://primaria-ciocirlia.ro/media/file/zunobadepobirinomoparames.pdf In PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/ch89utjddqkgkgmkqplei04mp3/10874087417.pdfIn PDF document text
    • http://medicapoland.pl/uploaded/file/kavejajutufuzojatanuzubop.pdfIn PDF document text
    • https://gachbinhduong.com/upload/file/44092935581.pdfIn PDF document text
    • http://joyearland.com/ckfinder/userfiles/files/murakerokarokofow.pdfIn PDF document text
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/fufowinixi.pdfIn PDF document text
    • https://torgradio.ru/new/files/file/69094266207.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/84520123364.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086ab6c1f33d---tupabi.pdfIn PDF document text
    • https://invest.pl/userfiles/file/mawubalinurejozigibukeso.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/16093c99773a61---48258061348.pdfIn PDF document text
    • http://kolasinprevoz.rs/slike/files/navosa.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16087875319d9b---favomesun.pdfIn PDF document text
    • https://oncetrabzon.com/resimler/files/98430211471.pdfIn PDF document text
    • http://w.scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/87700500630.pdfIn PDF document text
    • http://harlit.com/ckfinder/userfiles/files/20210818_111631.pdfIn PDF document text
    • http://h-st.nl/bestanden/files/35138201874.pdfIn PDF document text
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/1d1968bb42a06c97c1584d3613083bde/79613702618.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160c6cbcdc89b4---28885315825.pdfIn PDF document text
    • https://rasathantrananotech.com/ckfinder/userfiles/files/futoneba.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=l2+network+engineer+roles+and+responsibilities+pdfPDF 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_off0000be51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE51 15948 bytes
SHA-256: 114ed99b0f7ec91e330f2fec70321f42ec373c2268fe693973d257cc30719228
font_01_sfnt_off0000e6e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E2 11068 bytes
SHA-256: 8d0cf625aa7dc4fa738a1c7faa77b5240dfcf0fb4e1f4c92b86ae4e6e2199b45
font_02_sfnt_off0001007b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1