Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a0a8947e4c147be…

MALICIOUS

PDF

83.4 KB Created: 2021-09-07 14:16:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 976768f685b7393d2d61f7837ed42d00 SHA-1: 8fc71659fda9a217022694815a31d3e5f84b2b29 SHA-256: 6a0a8947e4c147be4b9a62cf2be2ec5b8e1c419d6c2608fa5a2385c189512852
176 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users. The presence of raw IP addresses in URIs further indicates a potential attempt to obscure malicious destinations.

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://zartmobilia.com/userfiles/file/20210623203622.pdf In PDF document text
    • https://fedico.ca/upload/editor/file/10056172524.pdfIn PDF document text
    • http://taispacedesign.com/upload/files/zososuwafezapo.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4ff6e0839b---67177014300.pdfIn PDF document text
    • http://xn--elementy-zczne-kwb98g.pl/media/file/68340443191.pdfIn PDF document text
    • http://sam-global.info/files/file/lavuroroj.pdfIn PDF document text
    • http://beiwendq.com//data/attachment/file/sekujitinavatibep.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160a5027779d84---15125685108.pdfPDF link annotation
    • http://tsg-edinstvo.ru/userfiles/file/56746294192.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/ed6e413ad76b6466b050ed600d261f61/lisibezuzebamajijinu.pdfIn PDF document text
    • http://bargiel.com.pl/ckfinder/userfiles/files/7451823098.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab8d175031a---xufobowegizi.pdfIn PDF document text
    • https://salvatoredivilio.it/userfiles/file/16679914258.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/016dde44395586ddc596c57d4b848c06/puwasupin.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/a8f427dd37d2a39988438d7b2585f5dc/75450080438.pdfIn PDF document text
    • https://jamurgoreng.net/contents/files/55127038982.pdfIn PDF document text
    • https://9ja-bet.com/userfiles/file/kogufuzex.pdfIn PDF document text
    • http://cloverpark1959.com/clients/51168/File/10237474574.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c82a7f39a6---puzugamevenojogaxesodun.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c25f4b9187---71670655235.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/qak01kcg16kh51rh1o7hrhjugb/62511063342.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/4ee47bc2278e76adfd17f96d4aea1c33/gizakurazepipafelafev.pdfIn PDF document text
    • http://gemculture.com/userfiles/file/pekinezejovanowadizo.pdfIn PDF document text
    • http://murasakijr.com/uploads/files/tazexovigabivozajesu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=doctor+sue%C3%B1o+pdf+lelibrosPDF 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_off0000dce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE9 19236 bytes
SHA-256: b08a08b18326817282d5ce907a7f74dff636e614bf8b99eb749c6b141f1132f3
font_01_sfnt_off00010d76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D76 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001258d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1258D 10792 bytes
SHA-256: 8a64572f2939886316b212b0b28ffb2f52936a95839b90a1d0882c7c5e6b7fb6

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