Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f8589a753b8946…

MALICIOUS

PDF

81.3 KB Created: 2021-05-25 01:25:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 92c6cc7f2dd63ec4cce1dc87a4766141 SHA-1: cf26fd7f2260a9a2dde0571589da9b27b6e54127 SHA-256: 07f8589a753b8946e407ce6c3d6a33a98766d037774690646dc85d9680c673f0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9996

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://queure.ru/uplcv?utm_term=lab+rats+nora+walkthrough PDF link annotation
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2393e34fa---motagirasefujiwoxolon.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160869fff26039---vezarutowutofavujemamifu.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ee95b95cd1---42474191148.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/b114682169bb1d66f626e9571efbf871/75006883363.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/nmuui5d2f2grkb5cdil66qnapr/40979563324.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606f10b90941a---80075623220.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/b2mj9q3h44d1qda0gvu8v0p742/todobojifufinakibo.pdfIn PDF document text
    • http://atenngo.com/admin/sites/site/documents/rariraxubusifidufavuxonup.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084aa33677fb---getatuju.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b210be3c14---josedalo.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607b3f883a56f---xisikaw.pdfIn PDF document text
    • http://asustainable.com/global/file/wigomezibij.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/e92206d4f27a0a738177e94e6490212c/biwejipopigawizetafuwup.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/ef5a48e954ae8fdd1e532625c687d276/97255317306.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/jl0qn5fodse7li1e5dfivno5fv/40039336269.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/62d2cd6173a704166ee52d684bd3b7d2/xemomatamawurowagarisepa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn 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_off0000d896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD896 6588 bytes
SHA-256: b3260a8b27c40a1c9408c40b3dcfb9ec9ded560232013cbc1ca8de37ebb5a831
font_01_sfnt_off0000e910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE910 5184 bytes
SHA-256: f3c3ad6792add078bf58ad35be8b177602afc3059411b4a5d38184291dacf258
font_02_sfnt_off0000fac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC2 11768 bytes
SHA-256: a7255dba04976c21deba802a0512d2e8b7dd5779a12a16b8947d7527ef0c36d5
font_03_sfnt_off00012237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12237 16204 bytes
SHA-256: 514ec34c774379c82780ce3b826aceada3291152a2a4734d997485cf707bbc49