Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e7a40abf7297b16…

MALICIOUS

PDF

84.8 KB Created: 2021-09-16 03:14:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: b2e1f27b862e60727628cde972798508 SHA-1: 30c17f8e93c8d002016965c50189b68c9ebb96ae SHA-256: 6e7a40abf7297b160547ab26d4586c3ddf35e30d8d5e99a85433a1b0978bfb57
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly support its malicious nature. No scripts were extracted, but the structure and URL analysis point to a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://puzynowska-kancelaria.com/userfiles/file/rutudezo.pdf In PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b348c4ae2d---6319117502.pdfIn PDF document text
    • http://viviapalermo.com/userfiles/files/nuwokinurigijofilop.pdfIn PDF document text
    • https://saatyapi.com/upload/ckfinder/files/90748489726.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/zilojozepirin.pdfIn PDF document text
    • http://reklama-kemerovo.ru/files/files/voxafedazejofekeponibut.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/7a66b40bba9e9f1e30f741639a85bebe/32889880452.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/b7qc455q3u3qacfn2d797lf4r7/24527388860.pdfIn PDF document text
    • http://beauty214.com/uploads/files/202109030111131745.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131a8ed38c50---88959128121.pdfIn PDF document text
    • http://www.gc-antey.ru/ckfinder/userfiles/files/1129413340.pdfIn PDF document text
    • http://topp.pl/_topp/file/28223099114.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/sedmthgjiof8pumc2gace44aj6/77221882268.pdfIn PDF document text
    • http://old.bgk-meshkova.com/ckeditor/ckfinder/userfiles/files/91453570285.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d40ad1e7be---60714726995.pdfIn PDF document text
    • http://nieruchomosciklodzko.pl/files/file/43416353079.pdfIn PDF document text
    • https://pastijptoto.com/contents/files/zekilejuxavobugepoz.pdfIn PDF document text
    • http://shengyaweb.com/uploadfile/file/2021091417161990.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e6780e25f0---14452197966.pdfIn PDF document text
    • http://vagyonvedelemszolnok.hu/admin/fck_upload/file/badul.pdfIn PDF document text
    • https://manorhair.com/uploads/files/202109031329557137.pdfIn PDF document text
    • http://abwcolley.com/uploads/files/23741145148.pdfIn PDF document text
    • http://newmob.it/userfiles/files/suwabigorileribodusaji.pdfIn PDF document text
    • http://interstroy96.ru/uploads/files/xetada.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=2021+new+tamil+moviesPDF 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_off0000e5e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E0 10520 bytes
SHA-256: d3ec8bec13bd166968384f7b09d22bcfd97f8e21fb863a404db0a223e26b7800
font_01_sfnt_off0000fdf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF6 18508 bytes
SHA-256: 9cbddf9fa0b9e024e844fbb941889f24e112beb4d464bbea08e245a7d30295f8
font_02_sfnt_off00012d96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D96 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1