Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f017944933162ce…

MALICIOUS

PDF

84.9 KB Created: 2021-09-15 23:32:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 44db467a06869499aee8a15dce1ff4ad SHA-1: b570fcf57bc1d0dcc6c725dc06e957d1abcb83b3 SHA-256: 7f017944933162cefebe13cba4d28c2a02eb4d5400beb71b284f588179fc1104
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery through these links. The file's structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://xn----7sbabaajmdfbk3ddf3azka3b6a2r.xn--p1ai/ckfinder/userfiles/files/nudome.pdf In PDF document text
    • https://ymy-tea.tw/upload/files/lilep.pdfIn PDF document text
    • http://acutecardio.ru/sadm_files/26903167040.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141c402668a2---20457020978.pdfIn PDF document text
    • http://hotechike.com/files/files/21142753432.pdfIn PDF document text
    • https://marikakozmetika.hu/editor_up/64639273364.pdfIn PDF document text
    • http://myslizdrave.com/soubory/91037972071.pdfIn PDF document text
    • http://meruzhankhachatryan.com/app/webroot/files/file/xitutifepexagep.pdfIn PDF document text
    • http://cp-tournament.org/ckfinder/userfiles/files/61660944408.pdfIn PDF document text
    • https://sapsda.org/SapmaUserfiles/file/19891089201.pdfIn PDF document text
    • https://tabularasa.lv/sites/tabularasa/uploads/documents/files/tusejoduni.pdfIn PDF document text
    • http://gramercy-grand.ru/files/file/10001224124.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/16131b2bc57acb---19715565773.pdfIn PDF document text
    • http://0vote.com/ckfinder/files/tifaximewilizasa.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/e641ecad32d7fdc4b431df48be696790/zijutaguxowopugusolopixa.pdfIn PDF document text
    • https://swagath.co/new/ckfinder/userfiles/files/kejamewobogil.pdfIn PDF document text
    • http://kibunajcc.com/ckfinder/userfiles/files/notedu.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/petetixarikozo.pdfIn PDF document text
    • http://nhungbaithuocnam.com/img-tvdl/files/76951035672.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139cb03b78da---73494707260.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c7d229e850---29700333203.pdfIn PDF document text
    • https://timminsrenovations.ca/file/Uds6s53YvRqGpmAA.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/zogegexogo.pdfIn PDF document text
    • https://ldoris.com/upfile/files/20210905102707.pdfIn PDF document text
    • http://malagi.pl/user-files/fck/file/pujibonawetosirakadiso.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=freezer+apk+musicPDF 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_off0000e65a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE65A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE71 10396 bytes
SHA-256: 4788c28ee92bab2e6cbdc4b94ca6e6730aa79a4417885e51887f295aed321be3
font_02_sfnt_off00011602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11602 18500 bytes
SHA-256: 2aa528086bae70239f5b938e2aa3584d6610f238d03980af11936c01325916d7

Open this report in the interactive analyzer, or submit your own file for analysis.