Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5deb175d076941b…

MALICIOUS

PDF

84.8 KB Created: 2021-09-08 02:32:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 47670accb1d56a6ea8dfe4c14cff0273 SHA-1: 29992ea3ab0e24e163589e05974608b91e3305d3 SHA-256: e5deb175d076941b256f6e51e5c5d79ecbd9f86041d636e23c38660cda6d0bd2
164 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm pointing to compromised WordPress sites and disposable hosting, likely to trick users into downloading further malware. The presence of a 'download button' lure reinforces this phishing-like behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/qr0b7qvg169nssencketi83410/62226038521.pdf In PDF document text
    • http://cbcom.eu/ressource/site-image/files/72030472373.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608159af96783---8705653681.pdfIn PDF document text
    • https://baxsporthorses.nl/userfiles/file/94304058069.pdfIn PDF document text
    • https://limsurdua.com/contents//files/bomarupixofeduve.pdfIn PDF document text
    • http://rayanchem.com/d/files/28671770022.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608cf642e8dac---15006404591.pdfIn PDF document text
    • http://paradisoseminatrici.it/userfiles/files/sipepemuzabezonavu.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3c7f6b5270---garupitusori.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/jomurowipijaguxo.pdfIn PDF document text
    • http://kammerchor-lindau.com/file/88651278627.pdfIn PDF document text
    • http://lpkgoodframeupvc.com/userfiles/files/pupivezinivigudeb.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f286101674---zebajupoduzog.pdfIn PDF document text
    • https://brianhigbielaw.com/UserFiles/file/gubedimesarudo.pdfIn PDF document text
    • http://www.bandungmesin.com/file/59963066811.pdfIn PDF document text
    • http://dogalakustik.com/depo/sayfaresim/file/domalirivukunol.pdfIn PDF document text
    • http://geombiagioschettino.eu/userfiles/files/zabogawowirepemuzawu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a05d8d2cad3---wilerurenegudewabelixexuk.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/guaq0q8ulo024e87p6h77s1pq3/63986942352.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/66554082560.pdfIn PDF document text
    • http://fkhd.cz/data/img/69984431726.pdfIn PDF document text
    • http://ambulatorioveterinarioilprato.eu/userfiles/files/6759788692.pdfIn PDF document text
    • http://www.alliance-bio.com/user_data/editor/ckfinder/core/connector/php/upload/files/gikiravodaliperekuxekub.pdfIn PDF document text
    • http://seja.lv/assets/ckfinder/core/connector/php/uploads/files/10628961511.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/28859551009.pdfIn PDF document text
    • http://permianhighschool1970.com/clients/e/ef/efee9fcbc667252fc4b649c8163d3733/File/33851373213.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=download+soal+dan+pembahasan+cpns+2019+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_off0000e5a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fdba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBA 11284 bytes
SHA-256: d480f55f30f7feceb17966ec74a0e2106318920ec8bdbf8889e8cacfb5dbca01
font_02_sfnt_off000117e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117E9 17848 bytes
SHA-256: 7492e569b2c41a269d912d1ab54376c3e3a01b813700bf434a8bcc47b769764d