Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce5a8ec4587f8af6…

MALICIOUS

PDF

80.6 KB Created: 2021-09-05 13:45:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: caaca9142057077c10db912fde3c67da SHA-1: 76b3cad1cfbd7e16cfef90948739377285b6a2b1 SHA-256: ce5a8ec4587f8af63931a776ba32e6e492fbfbdc216ab2bb77c443b8a60ef7dd
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document that contains numerous links to external websites, many of which are hosted on compromised WordPress installations. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates that the document likely instructs the user to open a password-protected archive, a common tactic to evade security scanning. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://sgyscom.com/upload_fck/file/2021-6-21/20210621215145910485.pdf In PDF document text
    • http://sanzmendia.com/userfiles/files/82623426948.pdfIn PDF document text
    • http://patronusalapitvany.hu/public_html/upload/dorozijijizobux.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/49bf718fa3ff78c0b44469bcedbe8749/sulexubefekinakaguxem.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/rg3n45sfhah0u9j05ut0s584uq/wekotuvovava.pdfIn PDF document text
    • http://chistogood.ru/admin/ckfinder/userfiles/files/zudunewejis.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1611562d368ec1---85977006636.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/bc32cf6d711cdee070475e34ae5ad5fe/zoxeju.pdfIn PDF document text
    • http://miele-service-center.ru/uploads/files/vipumavaxunukore.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/161186747827ba---47475065588.pdfIn PDF document text
    • https://la-klamm.org/Files/files/kagavekebekosibomudol.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/6ca1a5aaefc99e3dfc32b259b585651f/10216451773.pdfIn PDF document text
    • http://tekizolasyon.com/ckfinder/userfiles/files/risaxawulabadoga.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a70024898---gamikibavivugeb.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/8t9j861p5a252cn51tllrd77d0/48676733318.pdfIn PDF document text
    • https://sieuviet.net/webroot/img/files/gazev.pdfIn PDF document text
    • http://lammensfilip.be/uploads/files/fepojizejaputadex.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160a1e881f244d---48088875094.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/598d3900b046a495c29045f523c713da/32510559648.pdfIn PDF document text
    • http://amdind.com/userfiles/file/89314887658.pdfIn PDF document text
    • http://netinflux.net/userfiles/file/13217288161.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/lhu6qdphdaghu7pigegdupp0i6/doxowubolaxo.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1611304b50163b---29207873758.pdfIn PDF document text
    • http://elturo.ru/img/upload/files/xupolapojo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=free+chick+fil+a+application+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_off0000d667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD667 10616 bytes
SHA-256: 2b74d15e2e09d4cc1d67710c78b101cd41b3a19afff773d996503a94b9aa2cd0
font_01_sfnt_off0000ee84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE84 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10696 17932 bytes
SHA-256: d925d394e5eed8a372627952c8f4243f28f1eb0fa6e9d3838bc3e41d39d6380d

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