Malicious PDF — malware analysis report

Static analysis result for SHA-256 1297dabaff6d45a0…

MALICIOUS

PDF

80.8 KB Created: 2021-08-20 19:33:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 17b9100b6e902139c38d87824e54599b SHA-1: afc5648e8c396ce9640a25f91d127d02d48ad62f SHA-256: 1297dabaff6d45a010020b4256b3a723e9aa917ef6da7c407ce7c5fcb340dcbf
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to direct users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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 http://myapartment.de/web/editor/files/sifagetuvemabi.pdf In PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16086e081a2000---80976837610.pdfIn PDF document text
    • https://klubkanine.com/home/klub/public_html/ckfinder/userfiles/files/52320811340.pdfIn PDF document text
    • https://all-new-wow.com/upload/files/gazojid.pdfIn PDF document text
    • http://alexanderkanevskyartgallery.com/clientMedia/file/muveka.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/buzabijoxelazukupakep.pdfIn PDF document text
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/160817c6488a74---39601246417.pdfIn PDF document text
    • http://sk-uralstroy.ru/uploads/files/67390463565.pdfIn PDF document text
    • https://travelinnsuites.com/nbloom/fckuploads/file/77722418390.pdfIn PDF document text
    • http://dfwsedan.com/nbloom/fckuploads/file/xadewenoduzoz.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/0gur5orb9kqsbg6d37rmhf1jm5/34733615569.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/1da2ubvtcfklqah9b577a7eps4/dotibusa.pdfIn PDF document text
    • https://dulsuc.cl/userfiles/file/mapoloju.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f0f36ad5e45---54777121948.pdfIn PDF document text
    • http://byecook.com/ckupload/files/buzoduwudujem.pdfIn PDF document text
    • http://genarchi.com/data/temp/file/85277473480.pdfIn PDF document text
    • http://cuacongtudongbinhduong.com/upload/files/82197385703.pdfIn PDF document text
    • http://chunmianxian.com/upfolder/e/files/20210801201552.pdfIn PDF document text
    • https://primer-spb.ru/files/files/75158649211.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b32aa943550---bozudixi.pdfIn PDF document text
    • http://www.hydro-tg.pro/upload/file/mewutanivimolarutejudaku.pdfIn PDF document text
    • http://cohensevents.com/clients/74638/File/lenufupanebelawibeja.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607067adcbe84---64645339646.pdfIn PDF document text
    • http://janandpoos.com/clients/872640/File/bikowopuraxelaxaje.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=syllable+worksheets+for+2nd+gradePDF 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_off0000d529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD529 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED3B 17156 bytes
SHA-256: d0e06bf3924212c5cb448a62406a136e11311bc2599755f0081d13b52b100a43
font_02_sfnt_off00011a70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A70 11168 bytes
SHA-256: 5ebe673268fb6c97f9cac332e85668d3b77c512eb5bdf43c0fe2648cd7486d60