Malicious PDF — malware analysis report

Static analysis result for SHA-256 01ce0009e698ccc9…

MALICIOUS

PDF

92.7 KB Created: 2021-07-01 17:10:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9acfb7d6a1818a7cbd8c5a19c0469036 SHA-1: cd270505b330e3d86d3ff39a53abd6ebec3824ca SHA-256: 01ce0009e698ccc95a375eb0be39b2ceec59af5d31163afee78a662ff09b02ae
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites for phishing or further infection. The document body is heavily obfuscated and does not provide clear textual content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/c11ek6hsji6h82s9mpe2338a59/rupopavesovumewusefitid.pdf In PDF document text
    • https://arerp.kr/data/file///62080936231.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210606032527.pdfIn PDF document text
    • http://ngor2-3.com/file_media/file_image/file/18714943024.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/5792301b3fdf8088c35e6c838651edc8/64700981862.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/ffc93a052add009c044704839f35e321/mamebosogawamome.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/bf3471eda7176e5569ce1082bc5a6557/lilepufizep.pdfIn PDF document text
    • http://tropo-design.com/ckfinder/userfiles/files/jelanabewinatapixo.pdfIn PDF document text
    • https://bishopsalamatkhokhar.org/userfiles/file/buxalusosulun.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/81235952693.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/755983705d60167dbc290ef124d7e046/63634832166.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16084a6c9aaf7d---resubaziwapotiviroz.pdfIn PDF document text
    • http://sva-jeanroze.com/xmedia/file/13607167162.pdfIn PDF document text
    • http://comlark.ru/userfiles/files/86294517110.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/84e07d855539dfc03debe5d2f9f913f7/34701910618.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/tebazafifaz.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/1ad7ba1dcb8fc4b2b5d18b2c09e5f5a2/57195945531.pdfIn PDF document text
    • http://coopmong.com/ckupload/files/77035008839.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/93171417998.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b078e61dce6---wekotidipozipagef.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a7f942b5b60029efba6b264eaf84a27e/16305797665.pdfIn PDF document text
    • http://doo-san.com/userfiles/file/20210511071113.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608d745b1db95---birifanoduzobid.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/301945445177.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca9912c3b9---42318545366.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/5c7480801308077e7960fef0b473c230/gasomagipuju.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/7i2tr0iqm6edkd7nb26nf7os97/jizezelalopemekowurimivo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=alkyl+halide+reaction+with+grignard+reagentPDF 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_off0001079f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1079F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011fb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB1 17144 bytes
SHA-256: d53c44dd1bcbf3b65584796e7f449206e6a688fd8fad255465accd7ecea319a8
font_02_sfnt_off00014c93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C93 10756 bytes
SHA-256: 7f8e90c36310020e09fc65b69358e690037e8bd57ec131068c587aa4d64a8f02