Malicious PDF — malware analysis report

Static analysis result for SHA-256 886e91a1673f581a…

MALICIOUS

PDF

68.6 KB Created: 2021-09-24 14:33:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3065ecbd20975de69180d0a7aa5f68e4 SHA-1: 39c2dc71acaa1ed7f2b03c27e4896b03f7080280 SHA-256: 886e91a1673f581a0318fb22fe5b77959bb80641cda273aeb5ce80ac14cb43f3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classification strongly suggests malicious intent. The presence of external URIs and link farm heuristics points towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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://huntic.ru/uplcv?utm_term=wmv+on+android PDF link annotation
    • http://dermalab.pl/userfiles/file/papigudusodepefeti.pdfIn PDF document text
    • https://olivierdaulte.com/ckfinder/userfiles/files/bokemetulelufuf.pdfIn PDF document text
    • http://www.mousumibanerjee.com/fckimages/file/72008459186.pdfIn PDF document text
    • http://www.contal-farmer.com/uploads/files/34000478994.pdfIn PDF document text
    • http://ordineveterinarivenezia.eu/userfiles/files/pasanegixudiponafisos.pdfIn PDF document text
    • https://ajansnigde.com/resimler/files/galatuwunovomalidife.pdfIn PDF document text
    • http://www.sudeshnamaulik.com/fckimages/file/98779720032.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/0f04d0f6de2953a2380a4f96ed653a32/13911390234.pdfIn PDF document text
    • http://s2ipower.com/survey/userfiles/files/35074310521.pdfIn PDF document text
    • https://mygrind.ie/userfiles/file/28899411661.pdfIn PDF document text
    • http://aircond.md/upload_fck/file/39300020005.pdfIn PDF document text
    • http://jump360.co/upload/files/20210901165028.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/71509464375.pdfIn PDF document text
    • https://cobrawire.com/userfiles/files/12282569246.pdfIn PDF document text
    • https://turkuazhost.com/calisma2/files/uploads/17385381472.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/55c2c413a5aa2ba77580367a993a7749/46912000877.pdfIn PDF document text
    • https://wineuniverse.us/userfiles/file/99287819018.pdfIn PDF document text
    • http://xn--2-7sbddqrtdw3be6jua.xn--p1ai/userfiles/file/lupunox.pdfIn PDF document text
    • https://menokatea.com/ckfinder/userfiles/files/nonozofireratitizaguma.pdfIn PDF document text
    • https://romalasergroup.com/userfiles/files/kukor.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146d38b4194f---lutobidamanotukotiju.pdfIn PDF document text
    • http://suvagcentr.ru/userfiles/files/kunisow.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/f8090184c599fcf8ebfef801e1d80c54/52525796335.pdfIn PDF document text
    • https://cooperspick.com/files/sesisesan.pdfIn PDF document text
    • http://www.frank-diagn.hu/userfiles/files/zavawegazibar.pdfIn PDF document text
    • https://limsurempat.com/contents/files/kufafasuzoratevaguka.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_off0000b121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB121 14932 bytes
SHA-256: 2a12f53e8b206e56d59c8649472b83a8d8c85498582483e00ad3ffce320af45f
font_01_sfnt_off0000d6ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6ED 10024 bytes
SHA-256: 9325c4ad7f6cf23f553068da2d6a938d94aeb4246514689f511435e08dadcf5f
font_02_sfnt_off0000ed12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED12 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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