Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6e51a6fd1653fb5…

MALICIOUS

PDF

73.3 KB Created: 2021-09-08 08:11:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e0f82e82bca828bb14148af762df3322 SHA-1: ee84b52b6c490e9e4d5698c4d3405ada43b5c511 SHA-256: e6e51a6fd1653fb56e34cd16a25632119e2ae2540e0339dcfc09d3dcc1508c38
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is classified as malicious, exhibiting characteristics of a phishing lure. The 'SE_SECRET_RECOVERY_LURE' heuristic indicates it requests sensitive recovery phrases or private keys, a common tactic for credential theft. While no scripts were explicitly extracted, the presence of numerous external URLs, some hosted on compromised CMS platforms, suggests a potential for redirecting users to malicious sites. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9915

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://eraldocomo.it/userfiles/files/kemofuxigekugenufo.pdf In PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/5cdgmacaaf2jvt6i10hlesv7ut/jutujis.pdfIn PDF document text
    • http://hochrainer-elsner.at/upload/files/49146225723.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bb1694a2d3b---watijavijotik.pdfIn PDF document text
    • http://cuanhomkinhtoanthang.com/media/file/60598003628.pdfIn PDF document text
    • https://chung-pei.com/userfiles/file/xelubotejatewixozujewe.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/0mk01op5h8l6ko9h1nh27il898/39552347691.pdfIn PDF document text
    • https://12shio3.com/contents/files/zorajupevamibof.pdfIn PDF document text
    • http://sushiosushi.com/uploads/files/21996980605.pdfIn PDF document text
    • https://hram-uspeniya.ru/ckfinder/userfiles/files/xuxazofisedirogedeto.pdfIn PDF document text
    • https://klcmekatronik.com/ckfinder/userfiles/files/90050323070.pdfIn PDF document text
    • https://acavacecio.it/userfiles/files/wazepowarosobas.pdfIn PDF document text
    • http://karpatskiles.ru/store/file/35136577151.pdfIn PDF document text
    • http://xn--80aguejfegacgj0ad.xn--p1ai/pict/file/37361585449.pdfIn PDF document text
    • https://aksusu.com/upload/files/22902350583.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160be0109337df---ropadogizujuzowuve.pdfIn PDF document text
    • http://gma.ge/admin/ckeditor/ckfinder/userfiles/files/98025454675.pdfIn PDF document text
    • http://abwessex.com/uploads/files/kavulifazowobel.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bbd70364e6---zafivodireju.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c3b378c250---10981674664.pdfIn PDF document text
    • https://beautydiction.com/ckfinder/userfiles/files/98782755979.pdfIn PDF document text
    • http://intertexmedical.com/userfiles/files/saboxukiwe.pdfIn PDF document text
    • http://davidhammerstein.org/ckfinder/userfiles/files/futabatawur.pdfIn PDF document text
    • https://theurbanthinktank.com/files/22025442504.pdfIn PDF document text
    • https://sahodayabbsr.com/test/fckeditor/file/4529767728.pdfIn PDF document text
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/39ee41f6d0437ab3030084b9b987a282/70396606012.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=digital+signature+option+not+showing+in+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_off0000bc87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC87 16168 bytes
SHA-256: a30fc6de52a2277481f38500f9ef2ef2c4a565a241d4a6888ee893851754fa07
font_01_sfnt_off0000e5a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fdc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC0 10964 bytes
SHA-256: ede21b9ebeb44123402bde705674fd28191f150260073235c9279c016727e657

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