Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6dbab841a8b751c…

MALICIOUS

PDF

101.1 KB Created: 2021-08-08 22:06:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 47fb2a894afc9394250ea3c83d3bf303 SHA-1: 139733bd15a320fab599e5740ea519565b27644e SHA-256: c6dbab841a8b751c7271140e329b50cbcbf9b1d62c5556560eea298a8177779a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The document contains a link farm pointing to compromised WordPress upload directories, which in turn host other PDF files. This suggests a multi-stage attack, likely for phishing or malware distribution, where the initial PDF acts as a lure to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160f63621c7b5e---8446761675.pdf In PDF document text
    • https://tsafar.ir/basefile/tsafarir/files/sowalebamiwiputuk.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/tu9ob4bsgaifa2perehcg1bl33/lejudokaxixasogeboj.pdfIn PDF document text
    • https://aodaixuan.vn/app/webroot/upload/image/files/padafuborezakewozag.pdfIn PDF document text
    • https://jahanchart.ir/data/files/file/volabedudavi.pdfIn PDF document text
    • https://www.opsclown.it/ckfinder/userfiles/files/38477354869.pdfIn PDF document text
    • https://simplehome.ro/ckfinder/userfiles/files/kinevu.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16102d5cc3af54---91040104512.pdfIn PDF document text
    • https://wemservice.com/ckfinder/userfiles/files/pabirujamokizokajid.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160941f56b51e9---sereworugupexibu.pdfIn PDF document text
    • https://petala.gr/userfiles/file/lapewirased.pdfIn PDF document text
    • http://nirmalapublicschoolerumely.com/userfiles/file/wugobatepopipewokur.pdfIn PDF document text
    • http://cuspsurgeons.com/userfiles/file/45764019621.pdfIn PDF document text
    • https://diedacorporation.net/freesiafiles/file/90309104797.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf9e1860263---viwudilig.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d90719df44---liwifuseziki.pdfIn PDF document text
    • https://kodcomputers.ro/2664/uploads/robelosezasabujil.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/92225946676.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///visilafomeduworajasexu.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096ac3753351---34277834716.pdfIn PDF document text
    • http://poltinka.ru/userfiles/file/62619330894.pdfIn PDF document text
    • http://ibb-online.ru/f/file/teroboxotubatiduji.pdfIn PDF document text
    • http://vogiantinhmach.com/media/ftp/file/puzofuduledajuzule.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=ibrahim+tatl%C4%B1ses+eski+%C5%9Fark%C4%B1lar%C4%B1+full+mp3+indirPDF 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_off00011ced.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CED 21348 bytes
SHA-256: 9c4c51fb22ecb7acfbbaf0b50486a2f496534f6b2df8403538adbfd4c73d8ea2
font_01_sfnt_off00015123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15123 11388 bytes
SHA-256: 7d77eacf06013445e15c2456be32e09618a4580fcbd54562812107ac3e1324a9
font_02_sfnt_off00016b12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B12 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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