Malicious PDF — malware analysis report

Static analysis result for SHA-256 a645cf00108455db…

MALICIOUS

PDF

82.7 KB Created: 2021-09-15 17:18:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 74f9027efcf33934653a301af73f5964 SHA-1: fa64d05d6b5ebed98d203fd0b28c3bb61bf97fe1 SHA-256: a645cf00108455db8d038dfd0c256ead26f7e47ba172fa1d501fd965e8d0821c
204 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The presence of embedded JavaScript and numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggests an attempt to lure the user to malicious sites or download further payloads. The explicit instruction to disable security software is a critical indicator of malicious intent, aiming to bypass defenses.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=how+to+solve+parsing+the+package PDF link annotation
    • http://myslizdrave.com/soubory/wuvazoketanuxupoxasakew.pdfIn PDF document text
    • https://www.mmgrowersg.com/ckfinder/userfiles/files/wezojuwag.pdfIn PDF document text
    • http://ahknchem.com/upload/files/xotofagufake.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161404d0ae8477---8829100837.pdfIn PDF document text
    • http://davidhammerstein.org/userfiles/file/binumonekomeze.pdfIn PDF document text
    • http://unite-chem.cn/upload/files/37476363522.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/161322504ca259---17106501621.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/ni3so8nmlf6fatqsujrvpi7kn6/38930116334.pdfIn PDF document text
    • http://daugiavanthienphuoc.com/media/ftp/file/kipawog.pdfIn PDF document text
    • https://sausalito.com/wysiwygfiles/file/sunajufutem.pdfIn PDF document text
    • https://silverbirdmarketing.com/pages/images/file/47405441597.pdfIn PDF document text
    • http://7profi.net/userfiles/file/posaw.pdfIn PDF document text
    • https://www.bevillelecomte.ovh/ckfinder/userfiles/files/69231845494.pdfIn PDF document text
    • http://xn--90afqerdlt1f.xn--p1ai/admin/ckfinder/userfiles/files/67039817451.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613d961687495---13111403290.pdfIn PDF document text
    • https://ltssinternational.com/res/wysiwyg/file/potukaruzo.pdfIn PDF document text
    • http://ibsdhc.hpds.work/ecdemo/web/js/ckfinder/files/files/77454719568.pdfIn PDF document text
    • https://epponline.com/mentorfinancial/page_images/file/27764543038.pdfIn PDF document text
    • https://learnrkbin.jugalbandiresearch.com/ckfinder/userfiles/files/rowifopusekudawabefavete.pdfIn PDF document text
    • https://theelementrama9.com/userfiles/files/torepisatiratikeki.pdfIn PDF document text
    • http://grafichesirio.com/userfiles/files/nisoganu.pdfIn PDF document text
    • http://cozycornerexpress.com/uploads/files/budigotuvip.pdfIn PDF document text
    • https://mariapolis.es/ckfinder/userfiles/files/minopis.pdfIn PDF document text
    • https://inmaabiladi.com/userfiles/files/vukonatasugepezup.pdfIn PDF document text
    • http://www.siposferenc.hu/html/kevepowuzusimivasik.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_off0000e052.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE052 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF864 17080 bytes
SHA-256: 8d0d45b7a17f6ed7acbde227fd78a08963de7e28a9e9e99cbb5e64865d920fa2
font_02_sfnt_off0001240c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1240C 10888 bytes
SHA-256: b1887306cdf3cba2b3724a129f7d1be124c3292c9e5649cb5ad7d86867f6cabb

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