Malicious PDF — malware analysis report

Static analysis result for SHA-256 63180818a27c707f…

MALICIOUS

PDF

89.1 KB Created: 2021-07-19 03:29:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: a021472e8c1fe55f2e8cbd003253a6b9 SHA-1: 364a31b6703dead53712311786f7c08cfaaef113 SHA-256: 63180818a27c707f023af202e8b62404ef29d28c8bd19fde9d615a6f78d45a53
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress installations and disposable hosting domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest a phishing or malicious intent behind this document. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/6981f3fbcf5cb4d4e7fe549c3fd52f73/xanuwitimibozamozoj.pdf In PDF document text
    • http://aimic.com/userfiles/file/60497056306.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/574f45f1cc7180d6a5b58fff3b403ebd/32325329134.pdfIn PDF document text
    • http://candientushinko.com/images/file/riroritaz.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/b4b2f21d38a2b5db9c3b8ec644700cba/99373950642.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/nnv6hsark8nldve25jku6tner3/32644094270.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/ba9b883a9381c6eabb4c4dde0910233f/pakokopuson.pdfIn PDF document text
    • http://aloeverajuice.cz/files/file/begulimedorajep.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/9db9e75bb8ca6987b73214b2861ac048/14026432821.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d2a6f644fd---38269557482.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/46df2f4123b3ba7d9ef111edb936be60/50612680204.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/an7ch4j4hvr8kgc799ol8cske5/405776188.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082272cd8fc4---xenetowebijifidifu.pdfIn PDF document text
    • http://manixcnc.com/ckupload/files/43975237367.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c70208156e8---lawuxomuwugimawivovoz.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/4f0b6e7556e5f1ad8c5ae990bd4f1d10/27126265942.pdfIn PDF document text
    • http://walthamclassof1985.com/clients/5/52/52060312c10aa816a718e90a19a6a7a1/File/vetewujofodo.pdfIn PDF document text
    • https://larioenergy.net/uploads/file/sivewopajutawotuv.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/clcic16f8blu6rtlktdh2ou02p/22102512781.pdfIn PDF document text
    • http://asja-doll.ru/userfiles/file/zimekoxonixobapu.pdfIn PDF document text
    • http://mauchlineware.com/html/chapelstreet/web/userfiles/files/luwagotokarekumakimevipab.pdfIn PDF document text
    • http://inter-travel.hu/_user/file/razirof.pdfIn PDF document text
    • http://orsolyajuhasz.com/ckfinder/userfiles/files/lepaxidol.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/180unqdugukc0bv8gm3j15fqci/kiwaxif.pdfIn PDF document text
    • http://studiofagiani.eu/userfiles/files/84904657910.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/dobavamerirorabiwoxogomap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=a+mother+in+lawPDF 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_off0000f9a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A5 17260 bytes
SHA-256: c31769e21ffbb952dd33710f8760f02b3ac63ad763b2f03caf74a3ee450e7085
font_01_sfnt_off000126c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013ee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EE0 10272 bytes
SHA-256: eaba53535cc69bbb7313d06ef6faa1135c9522ca7d2891b371dc271e1cc03d52