Malicious PDF — malware analysis report

Static analysis result for SHA-256 219d702103604e7a…

MALICIOUS

PDF

89.3 KB Created: 2021-09-14 11:33:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: facb0f67a688c3e5aebfa4afb2bf6cfb SHA-1: 1c55e18f88af5c80c51f17d009c48d5ab2695e07 SHA-256: 219d702103604e7adf97603ae5b5ca7e2649d52a3d66e68b796b6ae414caf0b6
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains a link farm with numerous distinct hosts, many of which are associated with compromised CMS uploads or disposable hosting, suggesting an attempt to obscure the ultimate destination. The presence of external URIs and a link farm indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://vektor-bezpeki.com/userfiles/files/88259961479.pdf In PDF document text
    • https://www.agcontraincendios.es/ckfinder/userfiles/files/jesudawo.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef720d33d0---lirevusoxutokimuzeb.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/96041730040.pdfIn PDF document text
    • https://eyescare.vn/app/webroot/upload/ckfinder/files/66564053251.pdfIn PDF document text
    • http://articolo17.it/siti/usr/foto/files/76690884953.pdfIn PDF document text
    • http://cerritos.songhakbbq.com/uploads/files/87061166942.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/tp8ur6a46r2273q31ld2qlh4n0/81660655221.pdfIn PDF document text
    • https://nepalipublisher.com/ckfinder/userfiles/files/waxanonarusovogozi.pdfIn PDF document text
    • http://energo-winstal.pl/userfiles/file/63831130844.pdfIn PDF document text
    • https://taiwan-tiaya.com/upload/tiaya_official/files/fepeba.pdfIn PDF document text
    • http://verynailscm.com/user_img/file/jigejuxa.pdfIn PDF document text
    • http://architettobotteonpierpaolostudioabacus.it/userfiles/files/rurufesikaj.pdfIn PDF document text
    • http://leicesterbiketec.com/userfiles/file/62082832450.pdfIn PDF document text
    • http://ets-sptk.ru/pic/file/poril.pdfIn PDF document text
    • http://csptech.net/admin/userfiles/file/22692597436.pdfIn PDF document text
    • http://jatechkj.pl/upload/fck/file/monemelubamekawime.pdfIn PDF document text
    • http://www.humillacionyestrella.org/ckfinder/userfiles/files/zagunalemobelajofebejina.pdfIn PDF document text
    • http://chaodontuonglai.vn/uploads/ck_upload/files/kavugofikojozexoveberisup.pdfIn PDF document text
    • http://pilot-market.ru/new/files/file/44517815695.pdfIn PDF document text
    • http://muntepa.com/userfiles/files/xifomijozeruj.pdfIn PDF document text
    • https://nbretail.com.vn/ckfinder/userfiles/files/vibivitex.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613be4b97d2fe---nupowowan.pdfIn PDF document text
    • http://colorsoftexas.com/ckfinder/userfiles/uploads/wepafifavenasoxi.pdfIn PDF document text
    • http://rmgoals.com/userfiles/files/fifatulapasemotirofu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=download+higgs+domino+versi+1.70PDF 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_off0000f986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF986 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001119d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1119D 11040 bytes
SHA-256: 9c5475586398e0e3fac4c8ecd9a111d298ca1030f8c40280191317d03b9fb4dd
font_02_sfnt_off00012b00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B00 17060 bytes
SHA-256: 927a4c75df305c36797a89bf5e247b9d4900f7d1f678351314194061973fea95