Malicious PDF — malware analysis report

Static analysis result for SHA-256 a87b5065f9f741c2…

MALICIOUS

PDF

137.5 KB Created: 2021-09-01 05:58:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 5e42163c7d53f23f85b426af0defd827 SHA-1: 9623b03499a9d43f5ef6751f1d1e303e8137f597 SHA-256: a87b5065f9f741c2505b212c2235e6203beb719176c6077f7a4bc27ad903c374
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous links, many pointing to compromised WordPress sites and disposable domains, suggesting a link farm designed to redirect users. The presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611c3c7168ec2---88803197501.pdf In PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eae72e328e---wovositerew.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16129448b74f4a---kopugi.pdfIn PDF document text
    • http://mmprogetti.it/userfiles/files/rirazunen.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9549c1feb6---61562898824.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/ai0gmor0duu07um2f0dg4g8kvc/15006816995.pdfIn PDF document text
    • http://www.huntsvillepr.com/files/files/41984458670.pdfIn PDF document text
    • http://playbabydoll.com/userfiles/file/25731125063.pdfIn PDF document text
    • http://mdtrend.hu/files/file/sijozakokegadifoxosokisa.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/nipikobawarunexurejuxiwuv.pdfIn PDF document text
    • http://itkaufmann.com/images/fckimages/file/35706178360.pdfIn PDF document text
    • https://seeyounow.net/userfiles/file/ralumefawufasidapozepawo.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/1c83g1a0hur4invaonipt45rg3/jakoxirupaw.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/20421954348.pdfIn PDF document text
    • https://liffeyartefacts.com/fckimagefile/file/jeposetaxanezitefofuba.pdfIn PDF document text
    • http://connect-senior.ch/uploades/userfiles/file/1255366503.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16080ec26c8061---3142911236.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080e002efa12---nomalirikozezemipudi.pdfIn PDF document text
    • http://mobilesamara.com/img/files/file/nogosijemarupimagofa.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/6be3cd9b831e19c8fbc0e5cc02e35690/vikakudapodotokofasibej.pdfIn PDF document text
    • http://cravaluos.com/ckfinder/userfiles/files/11150789977.pdfIn PDF document text
    • http://op-gold.com/ck_image//files/93919358927.pdfIn PDF document text
    • http://www.specemc.ru/upload/files/raverat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=logo+quiz+cars+answers+level+3PDF 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_off0001b075.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B075 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001c88c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C88C 10892 bytes
SHA-256: 2b615d4038bd3a09281be49e7e9e1af478061774e14f9782ed2de9301e30d779
font_02_sfnt_off0001e1ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E1AD 20592 bytes
SHA-256: a81174669a537c1bd1387dd8093513ebcc0d2f0d0cf8f3b4e804769c9e3d94e8

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