Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7b628957ac7185c…

MALICIOUS

PDF

95.3 KB Created: 2021-08-14 00:36:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0451ff2f8b4595209398255d81063927 SHA-1: f32e801b6d28e2ddab03fb3454b732a0b7f7dea6 SHA-256: e7b628957ac7185c785736a949da97e74fbb81c531573337cc49884400980d73
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a link farm with numerous URLs, many hosted on compromised or disposable domains, suggesting an attempt to obscure the final destination. The presence of embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicate the primary function is to redirect users, likely to phishing sites or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 https://cristalparkhotel.com.ve/ckfinder/userfiles/files/80024245989.pdf In PDF document text
    • https://pediatricpotentialsnj.com/PP/PPpng/files/joxuvidelanomizi.pdfIn PDF document text
    • https://press-centr.com/images/file/kevow.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb3011de708.pdfIn PDF document text
    • http://24cvety.ru/upload/files/rekojijolagamoxo.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099cfed87d55---xinivuponukikog.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16070c82bbcfff---96660059809.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/vje69sd6dftjk7nm796201kcp4/13985101264.pdfIn PDF document text
    • http://geo-equipe.it/userfiles/files/66197432954.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d490022d7---35245088743.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/ec24bad29a5709d031f6b9b997ea877c/kakajifutupoj.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/smpf1l22uvop4q6196oritq5r2/razifutibewiwakara.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/sukizixunusivu.pdfIn PDF document text
    • http://chinasoftcore.com/userfiles/file///jejazabe.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/d41ff8dbc81dbd9c4432e31f6fd01f71/21064663531.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/g5kkrnjsbakb4fc3o4gibum5t3/likugopodebikovujivovesa.pdfIn PDF document text
    • https://toolsatool.com/userfiles/files/25243354161.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160749188d28e8---xagokudasit.pdfIn PDF document text
    • https://www.visitrwanda.com/wp-content/plugins/super-forms/uploads/php/files/2fb659c5f53775345b452c30336a1b00/75380060806.pdfIn PDF document text
    • https://anjingliar.com/contents//files/40694607311.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/76dc0ddceced58d8c7a36ab415bbae7d/mubigodekogeduxovav.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/0dd669398252d57ea97872f248ffb73d/gejewovigukofawafupixo.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/6640f9ff387ce71c8845f1633d729a92/nanapagapulejovi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=libro+dise%C3%B1o+curricular+frida+d%C3%ADaz+barriga+pdfPDF 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_off00010e23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E23 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012635.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12635 17492 bytes
SHA-256: 75f3d1fd79d20117057200e69edb8307b3b148b5daf0073dc9e78b579f55cc7d
font_02_sfnt_off00015280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15280 11120 bytes
SHA-256: dd923be7c74219d77031bf499733529ccb948703af94a37104cf8b100747b9cf

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