Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a8afe1d3b73c05a…

MALICIOUS

PDF

82.9 KB Created: 2021-08-10 02:46:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e0421b0a124e4346cef595ba964c1974 SHA-1: a930c98cbf4664618b36ade503f1a9741f6dc470 SHA-256: 7a8afe1d3b73c05a3b8bfe842f6d12f995854768dd021d4232c3e78482dd56f9
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or trojan delivery mechanism. It contains a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to obscure the true destination of malicious payloads. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway security.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://beiwendq.com//data/attachment/file/58479729780.pdf In PDF document text
    • http://traiteur-ribot.fr/userfiles/file/rarofuwusox.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/bcc6dsfb8n8hjl39fp108ntsud/20370478791.pdfIn PDF document text
    • http://sooclose.eu/upload/File/37822171139.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/c5a0d322347e30f350ab5096a56ff505/zuwexi.pdfIn PDF document text
    • https://bestofbucerias.com/upload/file/zoxikanutikuradikavagixi.pdfIn PDF document text
    • http://kolesnikov.pro/ckfinder/userfiles/files/60276630670.pdfIn PDF document text
    • https://tempatpasang.com/contents//files/46133154604.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/1043367499609c7e401ee02.pdfIn PDF document text
    • http://xn--80aamdqpfpr.xn--p1ai/upload_picture/53799063710.pdfIn PDF document text
    • https://didacostruzioni.it/userfiles/file/lumulas.pdfIn PDF document text
    • http://teraval.cz/res/file/dipukowizevadirosutogupid.pdfIn PDF document text
    • https://cabsfromheathrow.com/userfiles/file/givadu.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/pijurenusevurije.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/16072a5468534c---kusisuxezera.pdfIn PDF document text
    • http://austria-ex.com/images/blog//file/94330738052.pdfIn PDF document text
    • http://xn--3e0b556bhrbowi6undva.com/ckupload/files/nonevuresexo.pdfIn PDF document text
    • http://marthomaiticherukole.com/userfiles/file/jikopesaza.pdfIn PDF document text
    • https://marathonlaval.com/userfiles/files/85973404825.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/eg27m95a488elqqiue8417phts/12385740203.pdfIn PDF document text
    • http://spoanalyze.com/wp-content/plugins/super-forms/uploads/php/files/82e32863167096ec90a050405774566e/vobed.pdfIn PDF document text
    • http://www.otevrenysklep.cz/ckfinder/userfiles/files/fuboposibitajogaluga.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/a63d039a1ea7ee95cbbc3a7030a1a6c7/sevusalitiserisixafiw.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0932db1cd5---75026302473.pdfIn PDF document text
    • https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082ec856af47---zalegos.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/e42505237e2f6b546eaf5a539a64bb7f/likogavakiwodofurawad.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/o9ug9q99kt44n03455af6g9b4q/kagotidevutamopupamaguzo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=zombie+frontier+3+hack+apk+iosPDF 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_off0000e244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE244 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA5B 11064 bytes
SHA-256: ec88acf6dd0eebdef8f11b8df915023b446509d0a960a87d6045bc20f4245eda
font_02_sfnt_off000113ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113CA 15996 bytes
SHA-256: 670d1d2819a218137350219f4ecc13798aeb283a2e2698dfed6767988efa6ffb