Malicious PDF — malware analysis report

Static analysis result for SHA-256 fea346697ebbd08a…

MALICIOUS

PDF

81.7 KB Created: 2021-09-07 05:14:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e5134cde041537a1abd304c0705bf078 SHA-1: 74639fef0b717a79ba339441efa8ece8c53c9b32 SHA-256: fea346697ebbd08a98f2545e88fdd2caa0839c263608e28c57ad22dc8d481e12
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous extracted URLs point to compromised websites, indicating a likely phishing or malware distribution scheme. The file's structure suggests it acts as a link farm, directing users to potentially malicious content hosted on these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160868c431e44d---korig.pdf In PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/83thau90vu5a09timia1l9abb6/vowuzuwasapizisufu.pdfIn PDF document text
    • http://namkhoabacninh.com/images/files/34613918001.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/c4bd97de9b5c14450c0e49bfa5b1ab2a/lotizelutiwaxivafabigiv.pdfIn PDF document text
    • http://akpanlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vodutojajuda.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/91199929264.pdfIn PDF document text
    • http://hephatha100.com/clients/4/45/452f9a9cd3514f90eb92b3b4734a1f1d/File/90575403422.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612dc8f538caa---39954187770.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/b8fbc656ea97eb2b4de8bc314914c9c8/65764853913.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a8f984519---54143930986.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612067e84561c---8446163572.pdfIn PDF document text
    • https://denizlihorozu.com/resimler/files/7332652014.pdfIn PDF document text
    • http://jfac.kr/ckfinder/userfiles/files/6176803705.pdfIn PDF document text
    • http://erimti.com/userfiles/file/35931036115.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160abfbd11c027---gifopuzaboniruvanerag.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/16125f4a79516c---85586518832.pdfIn PDF document text
    • http://peterpan1996.it/userfiles/files/dotifados.pdfIn PDF document text
    • http://globalroomplus.com/bot/ckfinder/uf/files/xusot.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16081e533321f7---dabijufupugukat.pdfIn PDF document text
    • https://pointvirgule.ca/upload/editor/file/kufemag.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/luzopo.pdfIn PDF document text
    • http://studiocalderini.it/userfiles/files/78785141670.pdfIn PDF document text
    • http://roomyab.ir/basefile/roomyabir/files/rozinopejifugimaniwunafat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=resistance+seam+welding+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_off0000d9f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f208.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF208 17592 bytes
SHA-256: acc1797d8530d5cac80aa8218587ef482179d25414b2bbd416a0599ec5e52de6
font_02_sfnt_off00011fe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE5 10872 bytes
SHA-256: 9d132374670e3a243de8f2093fbd19feadeb12407722f3c29ba21a856a8e8aaa