Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5446696ce605325…

MALICIOUS

PDF

82.0 KB Created: 2021-09-01 23:07:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d984f1bf60a69ddbad1c9bedbeeca7ee SHA-1: 50e46447bed9db723074733aaab0d45911005669 SHA-256: a5446696ce60532520f73ac4581a15655c31f939de3237a868bc3905aed284c0
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised or disposable hosting sites. The embedded URLs are likely intended to deliver further malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://pistant.ru/uplcv?utm_term=ulcer+symptoms+in+stomach+pain PDF link annotation
    • http://mclarenquartz.in/ci/userfiles/files/riwemarojifubigipuz.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/qrcudc53u1lvp1ou0kffoqbud2/wapepixusarowo.pdfIn PDF document text
    • http://7sate.com/filespath/files/20210821145310.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d110c85908---mezovozilizo.pdfIn PDF document text
    • http://soldresold.com/Shradhdha-Mehra/soldresold/final/ckeditorimage/files/kitojulek.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/1cf7a5473f152c8580508bc5de10973b/ginureg.pdfIn PDF document text
    • https://jin-ji.com/upload/files/74600447813.pdfIn PDF document text
    • http://hangquangauto.com/files/gevir.pdfIn PDF document text
    • http://www.primariasantana.ro/uploads/file/341028183.pdfIn PDF document text
    • https://kaptenhoki.info/contents//files/63717433711.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073e39db9688---58257137764.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609906d52095d---riguwebavuzanuriwusi.pdfIn PDF document text
    • http://reunionclass.com/clients/7469/File/75609678352.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/sudugosavirosuxovepisi.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c78bd41e3ce---76986160125.pdfIn PDF document text
    • http://pphu-joanna.pl/fckpliki/file/90453365884.pdfIn PDF document text
    • https://netpage.info/userfiles/file/22740698688.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/fb722cc3b8d41a0174c4bb4009ffcd92/minugabumelimagax.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/8c63e10abae5d1716d5bdb9308da50cb/matafuvuguzabinizat.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff7180039b---9853761441.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/c45cb966135ed2c6f05d92612d2a7042/vobavonifabovuzekibe.pdfIn PDF document text
    • http://modamoda.nl/uploads/pic_lib/file/fukoxoduzuwi.pdfIn PDF document text
    • http://xn--80adpfaaeictf0c6c7i.xn--p1ai/public/file/nabonamomav.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_off0000dbc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DB 17616 bytes
SHA-256: 94a2a35d3826489814e21c0eaad95456f1c6486e827fee37bff129d826724bff
font_02_sfnt_off000121e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121E5 10760 bytes
SHA-256: 4d8291c4dce4cd7331305fc908589d1b65c5056f19f69f2b1127b1b8f774e0e0

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