Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d47bffda0c9094a…

MALICIOUS

PDF

87.0 KB Created: 2021-07-01 00:16:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dd86045de2d8a6e30b0c4269969286ed SHA-1: e1eee1b6dfe76b84a6aa1ed5716854810b9d6429 SHA-256: 9d47bffda0c9094a724d493f3088646fab0e8dc3a9b3c8f761e78884f0876c59
156 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan distribution attempt. It functions as a link farm, directing users to multiple compromised WordPress sites and disposable hosting domains, likely to download further malicious payloads. The presence of numerous external URIs and link farm heuristics strongly suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://turhantur.com/turhantur/files/roroletasiril.pdf
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/a21fb28db77a9c5c718974334474c751/48771114542.pdf
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/mnruv1id3og8ju5q7ov8parcmg/92006909316.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/d9sbisrjob1nkv8ph598dotc35/62006824179.pdf
    • https://amrapalispot.com/userfiles/file/belabowaremipotuvokifosal.pdf
    • http://falegnameriacastiglione.it/userfiles/files/19407921357.pdf
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1608eacc9eb144---9930428077.pdf
    • http://www.lnk-creation.fr/upload/file/36601248645.pdf
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/23qe42kp51qq8r8buqsvgjsn52/tebowilevubimarupi.pdf
    • http://phunggia.biz/userfiles/file/buzobuj.pdf
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b340f09a6---nefisepiba.pdf
    • https://whiteelephant.co.in/wp-content/plugins/super-forms/uploads/php/files/8e21e3633658ab9941bc9bd1fdbc2977/55369303396.pdf
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094cf5f663e9---kaxibisos.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/16084d453f396f---vafuzonasu.pdf
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9ebfce599d---nonuwewedubaponaverexiwo.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d3572b68c8a---vapobi.pdf
    • http://analogsys.com/uploaded/file/14500780326090e85d186c6.pdf
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16077acdd3bda4---fekolekerug.pdf
    • https://armagedonspedycja.pl/files/file/mokulugiwixuximogonamuf.pdf
    • http://controldellaves.com/app/webroot/arxius/file/8426191509.pdf
    • http://ridendo.cz/files/file/21568774444.pdf
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e64f02fd9---wixavugifewezaberabeja.pdf
    • http://cleanyachts.it/writable/public/userfiles/file/modezepez.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=cycling+15+miles+a+day
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f188.bin
f8b8436a2f3b8b768b9671956adae71cc043b95ca86677361dec20d6a3906689
pdf-font-stream PDF embedded font (sfnt) at offset 0xF188 10728 bytes
font_01_sfnt_off000109fd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x109FD 16792 bytes
font_02_sfnt_off0001220f.bin
055684d1dc5daed27b33e29aa60595071d834d33a2040db2600b72ea29ed3247
pdf-font-stream PDF embedded font (sfnt) at offset 0x1220F 16808 bytes