Malicious PDF — malware analysis report

Static analysis result for SHA-256 8410e05193225d06…

MALICIOUS

PDF

91.5 KB Created: 2021-07-12 22:53:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: ab8f8df4515e571133c92aae4a263a42 SHA-1: 95035edf3f0a7a8cd56a638b2027ca346af47e70 SHA-256: 8410e05193225d06e3b6cfd1e7b58e1a5236f188fb35641bf380755673138123
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV. 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 suspicious score 0.3883

Heuristics 5

  • 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
  • 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://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b5a478aff---lirudibukuxibapatavan.pdf In PDF document text
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/a03f68fdec9e3e94ea814cda3637fd44/regeb.pdfIn PDF document text
    • http://voxel-avocats.fr/uploads/file/fuxowalegapunede.pdfIn PDF document text
    • http://iowatriallawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/814160195.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16078736f252a6---6381957293.pdfIn PDF document text
    • http://chieucoingason.vn/files/kasaxuw.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fad963a5e1---68639325256.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c64c9a8fb30---73520365480.pdfIn PDF document text
    • https://edubox.mn/uploads/users/0/files/72461563131.pdfIn PDF document text
    • https://crownprolaw.com/userfiles/Proj_Name//files/15290994048.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160c26cc5975c1---46552069244.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/15e711ac8f8300552ca174aa15ea7adc/faxulujuvapitumali.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/nigamidejozixaxusedab.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ebdef7bd6b---82863384425.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/798d7dcbbcd29effb57eba656652d154/zadurigiwilajixi.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4bfca65f9---mumeledosefolav.pdfIn PDF document text
    • http://archinfo.ru/uploads/file/suridavidunaropurusu.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/k6m6q2hodp3ui5hoejoa4oerpc/57331948316.pdfIn PDF document text
    • http://atallmed.com/userfiles/files/gerakinad.pdfIn PDF document text
    • http://skybuildinfraprojects.com/uploads/16049013992.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/87752697059.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160c882af7509c---siwositupazipuju.pdfIn PDF document text
    • http://score1forspencer.com/clients/4/45/4587145e2679cb7673d0e21b436e5c25/File/39628387849.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=illegal+dismissal+meaningPDF link annotation
    • 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_off0000eb85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB85 10224 bytes
SHA-256: dac10f879809e9b6b38a1e48fce36c856353e362b6ce093fe78adcb48c4e68ff
font_01_sfnt_off0001021c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1021C 17536 bytes
SHA-256: 85eb0b5f6ed4207f4e7b315f01dc7c67f92d08abd7dcf2fec9dc19a199f8c9c9
font_02_sfnt_off00011ce3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE3 2380 bytes
SHA-256: 6fcb422521f68bb36a4d5cd15cf16381103032b6ee783103c8c67ee5a42a3eb0
font_03_sfnt_off00012723.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12723 22080 bytes
SHA-256: c6190636c9137507b36a78557718d107b083e6f1e5293bce52706ae8b9f27c89