Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d677d14ffaa48ff…

MALICIOUS

PDF

106.4 KB Created: 2021-07-29 20:47:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 03fb57ad91b6aa8e46e9e80c24bbca36 SHA-1: b614ca6ec6b9cdb31ca7ac57de254f5148045bbb SHA-256: 7d677d14ffaa48ff09242e1ce4ee6fc6d421b2aa1bb1fd0a4339877c404c9f2c
164 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it contains a link farm pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution attempt. The presence of a 'download button' lure further supports this, aiming to trick users into downloading a payload from one of the linked URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://alnahamgroup.com/userfiles/file/72599529140.pdf In PDF document text
    • http://bbfrontedelmare.com/userfiles/files/25170283491.pdfIn PDF document text
    • https://cleanenergy.mn/uploads/files/misisesi.pdfIn PDF document text
    • https://fenicia.uy/fenicia.com.uy/uploads/files/bavizapikusawogegaki.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160887488ba19e---44243577039.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a90bb8daa8f---julovelapewem.pdfIn PDF document text
    • http://aqcons.vn/upload/files/busok.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/740994b7ad0eb7a4a736f714c5d337d9/23228308903.pdfIn PDF document text
    • https://gangnampools.com/contents//files/82230291696.pdfIn PDF document text
    • http://luckdidea.com/ckfinder/images_store/files/46688653481.pdfIn PDF document text
    • http://businesslegalgroup.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/14558209337.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/e0056e76927e5ab3494f06d0f3dda51f/tisopujamixiruwozubume.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/qhj64v7s4ekl8ttgnlc5ipnep6/jigojav.pdfIn PDF document text
    • http://asiancfea.org/userfiles/file/78535610341.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c01c277dc0---vowirilevufasewe.pdfIn PDF document text
    • https://fiscalonline.ro/app/webroot/files/userfiles/files/54229055154.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/fuhvg589cuidgi15suh4k472nd/xokipozuropapaxuv.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/ee978c9d9c67313bbe268f6194d0f659/pitulegomoxupetolulogim.pdfIn PDF document text
    • https://postelezmasivu-plzen.cz/ckfinder/userfiles/files/76815220270.pdfIn PDF document text
    • http://ncabhsa.com/clients/875427/File/mefudikasaj.pdfIn PDF document text
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/fep9abseh9ekrncikf9dsu4m7m/92064384275.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f161a649dd4---97532799623.pdfIn PDF document text
    • http://www.humillacionyestrella.org/ckfinder/userfiles/files/datubanibosajedulutu.pdfIn PDF document text
    • http://brlairport.com/images/file/lowurivazijoruzaxuluze.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=how+do+you+download+fortnite+on+ps4PDF 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_off00013c31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C31 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15443 17384 bytes
SHA-256: 458682b1b8710609316417bcdf2821abf209876d089ad8c063e467a24cd9fc96
font_02_sfnt_off000181e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x181E3 10860 bytes
SHA-256: b806a98d97863479ce18ccf5121353f1eb7839ead254c071aac57065df3d7c0a