Malicious PDF — malware analysis report

Static analysis result for SHA-256 58c30779060cabe6…

MALICIOUS

PDF

90.1 KB Created: 2021-08-12 21:09:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 282abf672897dc60f3115aeab01db4e5 SHA-1: 243d98f3f9ce2d2f47b68d2b21bf3df1dec2756e SHA-256: 58c30779060cabe68249ab33cacc8a9f5d3148ae2cca46f3403e6876ce66053e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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 0.9937

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://crewmak.ru/uplcv?utm_term=counter+terrorist+mod+apk+unlimited+money+an1 PDF link annotation
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/30qran15n9174i7ddapfu58gf7/wasabix.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bda4f5cb546---kadirotezaxototezege.pdfIn PDF document text
    • https://blogsma.com/files/natizisididejugelabini.pdfIn PDF document text
    • http://avsa.org/sites/default/files/images/files/31788525685.pdfIn PDF document text
    • http://brandiassociati.it/userfiles/file/xatufabumugazedi.pdfIn PDF document text
    • http://ruoumoc.com/upload/files/55321419700.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607491e303180---12711319110.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/j2klur8935vdgiianbpsvr5i80/xipamajuziximixojiwedobo.pdfIn PDF document text
    • http://31kouqiang.com/userfiles/file/1625883716.pdfIn PDF document text
    • https://www.nexidia.it/wp-content/plugins/super-forms/uploads/php/files/ce0c1e36d86e30710ac4109a59f1abb8/5996342836.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16090dd03b2c68---rawaguludikadiladevulib.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/hfnvnihn2113q9sh9tqek0lq96/52267741618.pdfIn PDF document text
    • http://leadershipcareer.kr/fckeditor/_upload/file/kotukuru.pdfIn PDF document text
    • https://quatden.vn/webroot/img/files/89142386773.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/ba45d0065be3bc9d16cf15cfa3d1b154/26088493748.pdfIn PDF document text
    • http://aurora-c.jp/files/files/fomezelerimevetanilume.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b4c887a270---bixufobozomejoguxofu.pdfIn PDF document text
    • http://nhsclassof77.com/clients/c/ca/caa0b9827732345dad94809623212052/File/97080632038.pdfIn PDF document text
    • http://kasargod.net/uploads/file/76233460416.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/8lbnfadne1asqb44s6ckl65ftq/dumukawoluxowozonorirobeb.pdfIn PDF document text
    • http://oryginalnedekoracje.pl/userfiles/file/vukodoke.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/7e21d19d262576bb5fad5ede5fb29f2d/73642058325.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/9e52894d2990ebfdd9e57d9fa0a58b16/notenotugoruvum.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e799.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE799 16780 bytes
SHA-256: ff36e3b815704ec7cbfec38615ea4aa2f68f22abdf3b24adc49e31be69c978be
font_01_sfnt_off0001130e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1130E 16160 bytes
SHA-256: 5c13cceb9d36bbc2bc20aea0fe1d16ac5c722eae827defaa6d249ccd2c25c082
font_02_sfnt_off00012897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12897 10940 bytes
SHA-256: 995f3d31583a13c6e06786ec8103cc65d344ae3f9531684a5cc198d4f2740e87
font_03_sfnt_off0001420f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1420F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.