Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b37cbe5a788df3b…

MALICIOUS

PDF

98.3 KB Created: 2021-06-28 12:02:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 8d31027d48cf9f954857f78755c5633b SHA-1: 7cde22aed97a22c36114273c395b3825a193a55e SHA-256: 0b37cbe5a788df3b0c8111fe53e10730964e8e2ff210841c161ae5b880e10dbf
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users to potentially malicious content. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The presence of multiple external URIs and link farm characteristics strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9785

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://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/9kq6q48s5bsaui3aok072j4ve3/41442667502.pdf In PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/a5ef493eb4702763beeaf03e0d5c5eb3/netuwopabada.pdfIn PDF document text
    • https://yingzhaoliuart.com/upload/file/gasijudujejaxepuvufal.pdfIn PDF document text
    • https://aokman-drive.com/d/files/satola.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/84c2ea846896d436b829cfe653d0ebd0/tiritova.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1607757e61104b---51540967664.pdfIn PDF document text
    • http://wwstationery.com/files/file/84669389382.pdfIn PDF document text
    • https://arerp.kr/data/file///gifudavekenajulenevoxiwip.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/8bf50c72118fe857e70777baba8cf924/pigogujil.pdfIn PDF document text
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078b997162e4---3485948017.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607739732b424---57036595354.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/webepopo.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/924cea5b53e3a713dd725780ff53132d/zabedodedase.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5825ec4b8e---67675319407.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609d3ed3428a0---23378539196.pdfIn PDF document text
    • http://www.truca-taoules.com//ckfinder/userfiles/files/tafumesuvewipewepeg.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5cd92ae865---39205266415.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/zutarazetibaponowikufur.pdfIn PDF document text
    • http://quickvideo.nl/userfiles/file/48153633433.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1608aad38185e4---buweposunewi.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160ad6aaf6fd47---48219129613.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b80b1f2d261---tiseba.pdfIn PDF document text
    • https://terlickodds.cz/www/www/fckphotos/file/gaxobijikenu.pdfIn PDF document text
    • http://przychodnia-felinskiego.pl/uploads/editor/file/tukusire.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a949087d826---nijanavijenewiruxar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=coquette+urban+dictionaryPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f28f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF28F 21392 bytes
SHA-256: 367053ce584a4093ec0137f53bff01d2bdefb126a4c6512b5a3ea7f7686e3c4e
font_01_sfnt_off00012725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12725 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013f36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F36 16776 bytes
SHA-256: e175f3571d4441237aed4aa543166b659616f82b2d042d10f01f7c406c21c4d2
font_03_sfnt_off0001574f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1574F 10680 bytes
SHA-256: 567a5edd6d7df53382e8cb93d4325f336d95b068e50f284b15c1d4e846de3449
font_04_sfnt_off00016fbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FBD 2420 bytes
SHA-256: 8aae91749b948853965365e2dedb05aa47371fbd231dc49c53dd7ed951e7b885

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