Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd3a063c63106848…

MALICIOUS

PDF

81.6 KB Created: 2021-09-05 16:24:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 8f1ad14f14a4baf85b06cbad13095ec5 SHA-1: 5034192fdfcea348ac1ceaf36d98ed7048bc964f SHA-256: fd3a063c631068484730659d87fd37cceb16bede7d1fa50e0e2f7360c561e7bd
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload directories. These links likely serve to redirect users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/891c66795e992b812f8e5553374d886f/42701375616.pdf In PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6fa70dc76e---pofutati.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/9e2e25d3800207cb8048dde9d3f50066/nagadijigizekenene.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/ckfinder/userfiles/files/tepivenulusabasus.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160f0431a6bce1---valogerinune.pdfIn PDF document text
    • http://naturalmis.com/userfiles/file/9308526372.pdfIn PDF document text
    • http://dmkert.hu/files/file/79206672943.pdfIn PDF document text
    • http://simpelms.nl/userfiles//files/38046817376.pdfIn PDF document text
    • http://tovicetour.com/FileData/ckfinder/files/20210606_D2AA234568882296.pdfIn PDF document text
    • https://cape-electronics.com/media/file/56573278596.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/q7lsuuh85d0j2hj2r78k49ulid/kawataxinimeziduxomorebib.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cfdb351c047---jasidovuwulogit.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/2021523352245323.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c9904765bf1---46810711555.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/16080239d727d9---32750388831.pdfIn PDF document text
    • http://tingchucontrol.com/Uploadfiles/files/64250766773.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160edc604734d7---76936286541.pdfIn PDF document text
    • http://hotdeals24x7.com/ci/userfiles/files/54278033639.pdfIn PDF document text
    • https://triosms.com/userfiles/file/25954692504.pdfIn PDF document text
    • https://rugerwafers.com/demo/ruger/beta/userfiles/files/93698908828.pdfIn PDF document text
    • http://buydecor.ru/uploads/files/puzakebanuf.pdfIn PDF document text
    • http://monroe74.com/clients/871877/File/tapivig.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/ll0ca2ipkoj7kjofu77tp20jk4/7453433921.pdfIn PDF document text
    • https://betalinktech.com/blmedia/file/zuzesofuwig.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba7412851c---sojebijokajogu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=present+past+future+tense+review+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_off0000d95b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD95B 17780 bytes
SHA-256: f813c869c8acbc6be767ef151858cd11b06b9c9ab962c887492bda343329829c
font_01_sfnt_off00010818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10818 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001202f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1202F 10580 bytes
SHA-256: dae54ce95f5b6f2774e965ddc9ff7dadcb8ad74adb4f0f4c507efc5436bf1fd1