Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dcab83c8d546ee7…

MALICIOUS

PDF

87.4 KB Created: 2021-07-02 06:10:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: cbe07bfcadbf3d1199681afa15fd16de SHA-1: 7e045d5162243387f609b62f54c9313f4f8154fc SHA-256: 3dcab83c8d546ee726338b7e128318d3b4d52c8a541102d2ad763ea61b2efca3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection T1204.002 Malicious File

The PDF contains a link farm pointing to multiple compromised CMS upload directories, suggesting an attempt to distribute malicious files or redirect users to phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL targets are indicative of a phishing or downloader campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1609648a35b379---geberisaka.pdf In PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/5abd040ff9fb295de0f810f19986e634/dobivizuxuzapekeroxifapon.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/bubodiwulak.pdfIn PDF document text
    • http://pinetreerealty.ca/clients/55933/File/rukepitariti.pdfIn PDF document text
    • http://bbu.vn/Images_upload/files/68324320577.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/0edc81d642d72daf0f617108dc16270c/kixususolozaterisel.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084ef7f84d3e---6579074844.pdfIn PDF document text
    • https://foulardfotografando.it/file/vejoxatosiw.pdfIn PDF document text
    • http://watthaistuttgart.de/userfiles/file/rejox.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/4nhm2d6nobhvr0qepran7ms397/luganivog.pdfIn PDF document text
    • http://bioident.pl/photos_fck/file/zidenarabiz.pdfIn PDF document text
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/a68676de1f60d09eb687cb9aea04c970/fuvafevufejapekunezin.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb946523104---80347090109.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/73dac8a7b19b606d05c3271ea6fd8768/mezaminunotobesijiva.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/19483868237.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/e9bec4776bd2e2a653fa5e81dca88a13/42694725597.pdfIn PDF document text
    • https://tipresentoio.it/images/file/jeboj.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/hcjshq8d9rdvkmhllfhdadf780/9963761574.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160764b58cff6c---25684268570.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/u81u2obsak7hud4ncr4k3n2agd/60140352326.pdfIn PDF document text
    • http://cutencuddlybreedables.com/_images/file/wijagufesaxoxab.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/d6dd97bb73401e73f9bfd9a265eedff5/tujobajivefaparorub.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/b03178fa391586e1cebd6f71c06f7906/mugigasid.pdfIn PDF document text
    • http://gpmpoolandspa.com/ckfinder/userfiles/files/877756345.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=hydrous+copper+sulphatePDF 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_off0000f045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF045 10620 bytes
SHA-256: fd02c155dd4d1aebbc6d585a8a99c99f2f80404494ffe52d7846317ed7859a13
font_01_sfnt_off000108b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B3 17952 bytes
SHA-256: 70ccb161bf83529df677eda7953f97299a1b3d0d509f5b6019bc9bfcc91d32f6
font_02_sfnt_off00013863.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13863 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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