Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ec30b35f951b7a0…

MALICIOUS

PDF

86.6 KB Created: 2021-09-01 03:52:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6f1af0ee28eedd20f9ba06c007b40429 SHA-1: 03338e11bc285107534e891cf32d5e0a6e8d5336 SHA-256: 1ec30b35f951b7a078a652697ce54fcf7ca81c4cdfdf42e3bc7de0ab783e43a8
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 0.9991

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://wastran.ru/uplcv?utm_term=my+waggy+tails PDF link annotation
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16073a98ade324---zazezodisi.pdfIn PDF document text
    • http://jingkangchem.com/upload/files/77441638409.pdfIn PDF document text
    • http://www.sun-green.eu/ckfinder/userfiles/files/seresewixavilekixim.pdfIn PDF document text
    • http://evevoyance.fr/adh/.-/file/84449163979.pdfIn PDF document text
    • http://greece-ex.com/images/blog/file/59815150316.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/jvek40ie3vrscuhngf1t8flc30/57386063710.pdfIn PDF document text
    • http://caythuocnam.org/images/files/22738245313.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c32cf73d536---xozojabaxufavifuje.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ac020215d49---13194373918.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b454c74b49c---90237908756.pdfIn PDF document text
    • https://clubforeducation.com/FCKeditor/userfiles/file/95067620056.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/c88b100f563206e0f5f017fd55ecbc1d/bajimemegoluluvutozopej.pdfIn PDF document text
    • http://hotelbellevuepalermo.com/userfiles/files/17643385727.pdfIn PDF document text
    • https://hopadive.cz/ckfinder/userfiles/files/bopuredej.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba62178ea6a---zadowutefimumedezabiwuke.pdfIn PDF document text
    • https://topinsolventa.ro/userfiles/file/28446722849.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb59e3ebdd---49711146979.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/diwiwamum.pdfIn PDF document text
    • https://anna-bel.com/app/webroot/files/userfiles/files/pakilixasizutase.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/jafexowi.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160b1a6abf1f92---xigoxusake.pdfIn PDF document text
    • http://eska-lift.ru/userfiles/file/96206912928.pdfIn PDF document text
    • http://bonfiremadigan.com/uploads/fckeditor/file/85987295290.pdfIn 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
    • 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_off0000ea4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4B 19136 bytes
SHA-256: 0b18bb56c42ee6249e6278dc22e678204aa1438350f157e9ff73866a0ef5dd56
font_01_sfnt_off00011c7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C7D 10020 bytes
SHA-256: 9f086512fc6f88dbe81b5f5094382a651697c0b44581e6e2b6787a8f7ae48b4c
font_02_sfnt_off000132e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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