Malicious PDF — malware analysis report

Static analysis result for SHA-256 6071663ca5a1f561…

MALICIOUS

PDF

83.9 KB Created: 2021-09-06 23:43:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: b7b9cfa1e42aeaf212c33608ba2a14af SHA-1: 99bbfa0384339affb611db7b09594dd283d147bd SHA-256: 6071663ca5a1f56183cad66aa8d4c3914c8afebb7a59eba578595c3a6ecc97bd
176 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Numerous heuristics point to the PDF acting as a link farm, directing users to external URLs hosted on potentially compromised or disposable domains. These links likely serve as a lure for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://dzbnf.com/upload/file///gazokosufofe.pdf In PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608303e554782---petugonanid.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160795ffcabc57---48347744011.pdfIn PDF document text
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/vqblojj519tnokncg282f1b6ql/30580343406.pdfIn PDF document text
    • http://ptairsupply.com/userfiles/file/64235936406.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1609840c809f69---bapefudezowa.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/18003982775.pdfIn PDF document text
    • https://ptogel2.com/contents//files/pudadufuwemibelixesado.pdfIn PDF document text
    • http://stylekd.ru/files/xuxewitexobuvore.pdfIn PDF document text
    • http://mosjob.ru/images/file/27622314239.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/df351acdeac768f233cf124822f814b7/rivig.pdfIn PDF document text
    • https://tvsporedi.si/vsebina/pidovixiz.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/35c0c1a32b261ae4010008d936461032/55231239837.pdfIn PDF document text
    • http://safarang.com/basefile/files/28809053828.pdfIn PDF document text
    • https://designclarf.it/file/tigafiza.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/21864422214.pdfPDF link annotation
    • http://carneslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/61820248432.pdfIn PDF document text
    • https://mmagame.com/userfiles/file/razizipuxixojotiwul.pdfIn PDF document text
    • https://bd-sokolovska.eu/userfiles/file/90783492928.pdfIn PDF document text
    • http://zoldjogsi.hu/uploads/files/gulexebemidaxitulesod.pdfIn PDF document text
    • http://minipit.com/data/files/64391061055.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a100e19aa5f---vumegetofiduf.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ecaf7f55b---kunug.pdfIn PDF document text
    • http://cafegreenwichvillage.com/uploads/files/zuzojam.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=my+reflection+mulan+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_off0000de7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE7C 19296 bytes
SHA-256: c5aa845a9d2f248b7b4d604db2f4dc66c359e60d452ba1e0348ccd8574f5bfc8
font_01_sfnt_off000110a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A4 10820 bytes
SHA-256: 0ac26ae180ec00c2f73e38a3bcc1d19f47d1ab7031c76468274bd8f9c030e3db
font_02_sfnt_off00012998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12998 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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