Malicious PDF — malware analysis report

Static analysis result for SHA-256 06c10ad76f72350e…

MALICIOUS

PDF

91.2 KB Created: 2021-08-04 23:44:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 57522daf0ff77041155447f73e4e1d84 SHA-1: dc4d24a01b2cd1291ed324e41b3dfe39ac98bb47 SHA-256: 06c10ad76f72350ea2ee08ce5a58fbba59da8090037d58cd8d0cdb90aa7c7ef3
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 0.9985

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.axelendinggroup.com/wp-content/plugins/super-forms/uploads/php/files/75020e66e38cbbfbd5fac77b8daca74b/67331569932.pdf In PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9e03988c7---4261041941.pdfIn PDF document text
    • https://oncetrabzon.com/resimler/files/lirasopomuperijasovimoki.pdfIn PDF document text
    • http://dancedynamicsla.com/clients/38740/File/xetijagiturimudew.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/92e6db22634dcf7a77db551a112b5c15/3643977990.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160745454bfbd4---5365400736.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/16083b1b25205a---wamuvemavudipopufujuta.pdfIn PDF document text
    • http://sankofalectureseries.com/clients/a/ae/ae3037074ff26ae8502dacd236f4ced8/File/35190973361.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/3821462486.pdfIn PDF document text
    • http://jornalespacoaberto.com/app/webroot/datafiles/editor/files/44999109920.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609c9af08d7e4---wevonurobataz.pdfIn PDF document text
    • http://aodaibooking.com/FileData/ckfinder/files/20210714_0BF0D2061FE0B329.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b5769930b6a---velomumufinededuzujekoraw.pdfIn PDF document text
    • http://apvn.info/userfiles/file/73791789782.pdfIn PDF document text
    • https://designcoordinators.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c88d695940---febasubitujebumafupi.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/3617f5abd38643975299962eb2e90fb0/talisuxapenezofap.pdfIn PDF document text
    • http://ranagro.com/files/kofejininimirolapesakaje.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/97ebbd1ce1172afbb9e27f20161353e8/gatetodoj.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160e840d094e5c---kedisamesi.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/d465da01ee36c13c2eb2daf8caf289c0/56268167514.pdfIn PDF document text
    • http://finemetal-cn.com/upload/files/niximobexemedezaxadop.pdfIn PDF document text
    • https://bursakaynak.net/userfiles/file/26357731810.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cdebb7eba3---42977229825.pdfIn PDF document text
    • http://safetypath.net/cms_images/kedepavaridus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=the+hunger+games+catching+fire+watch+online+123moviesPDF 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_off0000fb1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB1F 11340 bytes
SHA-256: f36fc5912450671fa320a7ecff37e6385624bf3064d729c502440a6c8c4418ae
font_01_sfnt_off000115d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115D4 17444 bytes
SHA-256: ccce95351dfcaff513534a720d5054ca9582e29a0c9bedbce625d04e617fe266
font_02_sfnt_off000143bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1