Malicious PDF — malware analysis report

Static analysis result for SHA-256 89a2a4f6fd7b98b9…

MALICIOUS

PDF

82.6 KB Created: 2021-09-19 02:09:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1bacb54159d1dfb4fccdddd177b5ed24 SHA-1: 22193ffa5f4f93cfbe5af5eee244b7ac2e1a3c96 SHA-256: 89a2a4f6fd7b98b9d77a732736f326fcc2fd449b73ef926ae8d475df89c72bec
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links pointing to compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of a link farm on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://otoozevran.com/resimler/files/85651354657.pdf In PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/161321bf4bd6e8---lujabuxige.pdfIn PDF document text
    • http://energyexcess.com/userfiles/file/60804553206.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16134c4352d868---93081472809.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bc6aff2f0a---7575977149.pdfIn PDF document text
    • http://cu-hinothai.com/ckfinder/userfiles/files/85843215880.pdfIn PDF document text
    • http://rajasthanmetals.com/userfiles/file/fevuwikefoxategasosoxakev.pdfIn PDF document text
    • http://hocomesun.com/upload/batejitawipudiden.pdfIn PDF document text
    • https://champion-osk.pl/userfiles/file/depalamokifel.pdfIn PDF document text
    • https://thokhoavietnam.com/upload/files/vuziresi.pdfIn PDF document text
    • http://xtra360.net/campannas/file/67029032514.pdfIn PDF document text
    • http://oryginalnedekoracje.pl/userfiles/file/49070079450.pdfIn PDF document text
    • http://hotdeals24x7.com/ci/userfiles/files/xebetopokinixomodorejop.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/kumilugedowofivu.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/183f9eedb885131bc48e2f6aa35273c2/57853050547.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613a0fa1adfe6---sawodomafut.pdfIn PDF document text
    • https://www.travelknowhowscotland.co.uk/assets/js/ckfinder/userfiles/files/16739848061.pdfIn PDF document text
    • http://neogmbh.de/www/sites/default/files/userfiles/file/93345902799.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613ac86ca75e7---61209101229.pdfIn PDF document text
    • http://www.iece.in/userfiles/file/59442997033.pdfIn PDF document text
    • http://sushinamu.com/uploads/files/pikakowulunudemak.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/tgdb4pcvvdcb48oqc12dhf7t0k/50227276285.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/670a9984ba6923c597efcf151ddb317d/33170372594.pdfIn PDF document text
    • https://projetovm.com/uploads/files/48470350918.pdfIn PDF document text
    • http://taxfreepoint.com/file/watijevikujerugepalovufoj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=small+size+psp+gamesPDF 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_off0000dff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF6 10308 bytes
SHA-256: 4a568f13716c64ade95da0d43c6184503cf121150787b48264d7cff54aaa6afb
font_01_sfnt_off0000f733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF733 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010f45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F45 17728 bytes
SHA-256: cf633404aee6a1b767e7facde3cc7abc49bbc2e07729010bfd7a770b05698335