Malicious PDF — malware analysis report

Static analysis result for SHA-256 1db86a343519fcbe…

MALICIOUS

PDF

87.0 KB Created: 2021-07-24 09:05:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2c16f790d14fbdb0d343a05786f731f2 SHA-1: f664e132964c6de47694ceb472c2fa8554207575 SHA-256: 1db86a343519fcbe2daa674a291724c52daf08f93688467df6722c290f3152ba
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it is a link farm hosted on potentially compromised or disposable domains, designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution attempt, likely using a spearphishing attachment vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://mjsolankifoundation.com/fck/imagesfile/76977343876.pdf In PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e7e031e6cbe---zuvunifonugoxopefuminuw.pdfIn PDF document text
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/mjtr3mh2sogk960gijv3t3u4h2/92634784853.pdfIn PDF document text
    • http://grandinhr.eu/images/user/file/geboridafefudupofote.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d1c319e780---xaguduputagopa.pdfIn PDF document text
    • http://urjabatteries.in/userfiles/file/92198492825.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099b453c09d8---62394531062.pdfIn PDF document text
    • http://phayaotechno.com/UserFiles/File/marodalakunorurefedifi.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/38667406623.pdfIn PDF document text
    • http://christschoolblr.in/userfiles/file/4357022284.pdfIn PDF document text
    • http://fapannimario.it/userfiles/files/pasovifitimi.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/68a1c75f5e4fdf7bcf6c28bd05806ea9/gunozapemijowexoveliduru.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084802f7779b---71260328391.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/lubisalevogobugemapuli.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/rabigafufulasoxokapulovop.pdfIn PDF document text
    • http://tsrmvolontari.it/userfiles/files/xekilivosamibudajobezodur.pdfIn PDF document text
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/mobew.pdfIn PDF document text
    • http://ezibra.pl/upload//file/xujanojafotanuxivuxijo.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/16088e3a37221c---jedolazubarem.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160cc36150ce68---jibupinorarami.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c84bf615c0a---lipuzuvepowijokatoj.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609858137f657---52105792423.pdfIn PDF document text
    • https://kermoulin.com/userfiles/file/49794948250.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/16098a68b90c94---vemutixewo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=lg+smart+inverter+refrigerator+not+coolingPDF 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_off0000f172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF172 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10984 17136 bytes
SHA-256: b5e77072e2d634c7086b6b8a061286848e3910199126292ec796a37bd6167c77
font_02_sfnt_off000135f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135F8 10700 bytes
SHA-256: 5f081d470a65ef0edcbbf6fd98b0deb526b8475b864d2d4c2402d4e422a42f7e

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