Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ede0486d6c56582…

MALICIOUS

PDF

105.5 KB Created: 2021-07-09 01:51:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 015dd9e612f5e2e8300ad05401569c1c SHA-1: 13a782a1d2bfb090c496638bdf65bed5c47261a2 SHA-256: 7ede0486d6c5658257cd2e7114aa51994a11887f1dca0a70ec4a034732674bfb
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous embedded URLs that point to compromised websites. The presence of multiple distinct hosts and the use of 'utm_term' parameters suggest an attempt to manipulate search engine rankings or distribute phishing content. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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://dentalclinicbangalore.com/uploads/46577330413.pdf In PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/9cf043407e183844866cd6adb0d1a744/bebevufilowagazokife.pdfIn PDF document text
    • http://studiotravenzolo.it/userfiles/files/jisaxefisoxugitelu.pdfIn PDF document text
    • http://grupopiscis.com/upload/files/38184347517.pdfIn PDF document text
    • http://ansing.nl/userfiles/file/xapewib.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/d5abe3893d9d19b93f7033548ae2d26a/gakuxidonumilovuki.pdfIn PDF document text
    • http://hydrem.ru/images/file/37268200199.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3d098780f---94204293436.pdfIn PDF document text
    • http://txextremecarts.com/userfiles/file/bajipowo.pdfIn PDF document text
    • https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/e6d30d8662cbbb561c05f17f522a5ad9/1867122393.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b48f95d8f2c---jibebedivarefowekuxudeb.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/fojisatot.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c6fbd81a3a---benima.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9bebbc8aaa---kumidafezosani.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/0apmenbicbohunr8toptclttm3/jixab.pdfIn PDF document text
    • https://arredamentigiacobbe.it/file/rilat.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606c84f80b563---lazunofuzurefimod.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/r8mikr15b3s8k1rfpilrtr9087/jowadoborezetadam.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/peodbo51ogaep0jjnru1ie1jca/8737873956.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/niworusuwujonolaz.pdfIn PDF document text
    • https://grup-insaat.com/userfiles/file/29288242977.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a37a1d1f700---konupamazafadu.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160cb52d42181a---dipib.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=density+and+specific+gravity+of+waterPDF 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_off00013570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13570 18848 bytes
SHA-256: 4f39242af8e1ff22d8e99ab73eb4070d94b955993c9256535639e87f58dc5611
font_01_sfnt_off000166fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00017f15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F15 11016 bytes
SHA-256: 938f4acc2c631c605318d05d81644315c75c8384e5ce4c26708b3fa8629f9ca4

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