Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7d29d6ad6adb9bd…

MALICIOUS

PDF

103.6 KB Created: 2021-09-01 05:44:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: 44928e3aaba8116cb632e539d1772a7b SHA-1: d0b2fe9770a4f64709e4c1133fbbfba48a50c86c SHA-256: a7d29d6ad6adb9bd96e01475d6e781ee9e006f4336e7e03988542846361aed1f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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 https://chcial.ru/uplcv?utm_term=lily+collins+love+rosie PDF link annotation
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/05e63db42736eba8556ee0d767a2e511/purekun.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16072b8c8adbc7---kelapuvaliwiro.pdfIn PDF document text
    • http://papaicountrylodge-longstay.com/user_img/files/fukelenuxul.pdfIn PDF document text
    • http://detaycopymatbaa.com/userfiles/file/loforukuf.pdfIn PDF document text
    • http://northphoenixmustangs66.com/clients/4/4b/4b49b54eec06ebba3741256e9f3e6f2b/File/30797485755.pdfIn PDF document text
    • https://t2sc.me/userfiles/tilutiponifenukuvawedob.pdfIn PDF document text
    • http://teleinwestor.com/userfiles/file/19478428506.pdfIn PDF document text
    • http://www.museopizarra.com/ckfinder/userfiles/files/68892338245.pdfIn PDF document text
    • http://mq-water.net/upload/44472027377.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160811de79703a---dapokafujizetarevob.pdfIn PDF document text
    • http://greatwalledmond.com/ckfinder/userfiles/files/86764179969.pdfIn PDF document text
    • http://xiaohecollege.com/d/files/43898137739.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160afc2ece30e4---giruxodokenutuvuba.pdfIn PDF document text
    • http://onthebroadway.com/CPD/adminpanel/upload/file/20316475982.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/8g28f66vor26u8q0ia0o3jquv2/nifuxamonenanotolad.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092d600ad72c---53852209551.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/aaf843ba31da048608378836abc0dd1c/gazojiwefe.pdfIn PDF document text
    • http://bamila.vn/luutru/files/duwolifemififava.pdfIn PDF document text
    • http://satakantaresort.com/user_img/files/62254742591.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/gekroeq03bah07aktbf346roup/68059362269.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff57f5ac1c---fotitixogetebuwozetevu.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608e3c7c27684---tanufemavaf.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160791207a8642---nusifikakivuvugaj.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/taf4gkgcl1ricmm4evu33830q6/pigajirufifejuvolevexen.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/1c5e669eaa1ac3568a09e203330910f4/vovolajodejuto.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010452.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10452 16864 bytes
SHA-256: 9e9e09db2adfe46b002ee20fc0d175784fccdc9e1d1f8dd58cc21718dc52f4a9
font_01_sfnt_off00011cb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CB8 27288 bytes
SHA-256: 9d6188bc14c7974edcb13c6963c5ab63a1b5295bdaf718c0c2beba76e527ab36
font_02_sfnt_off00016089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16089 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000178a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x178A0 10100 bytes
SHA-256: 7618091aea0a0923713f39525ad243f00208f481807021327ba957bd941cab20