Malicious PDF — malware analysis report

Static analysis result for SHA-256 adfabaa7103d9415…

MALICIOUS

PDF

95.7 KB Created: 2021-09-06 12:58:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 4fbf3d43c30fa5c9f9a472d58edfff66 SHA-1: 89c1501fc21d0fc37e5ebc61181a9febe4b4ffa3 SHA-256: adfabaa7103d9415bbfc625edf969ffcc7cde3c2111a6bb4219fa80f08289676
154 Risk Score

Malware Insights

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

The PDF contains a link farm directing to multiple domains, including compromised WordPress sites and disposable hosting. This behavior is indicative of a phishing or malware distribution campaign, likely delivered as a spearphishing attachment. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5605

Heuristics 5

  • 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 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
  • 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://4998horo.gmmwireless.com/contents/files/9366522867.pdf In PDF document text
    • https://teenvolunteerhouston.org/wp-content/plugins/super-forms/uploads/php/files/9003551620e4d14dac6ddd8211bed184/gixefufi.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/55974580846.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/2750bdb772aba0a0e141fe0703fa800b/nekulidoj.pdfIn PDF document text
    • http://on-video.com/movies/movie_data/file/wabipewat.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/3796a1597956fd1fab1b261dcfa1ab7e/gejagimesofuso.pdfIn PDF document text
    • http://valkexclusief.reviews/app/webroot/files/userfiles/files/9160195805.pdfIn PDF document text
    • http://xn--80affcyoc0ac1f6a.xn--p1ai/admin/modules/ckeditor/ckfinder/userfiles/files/58475229345.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d2364078709---15326701073.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b98b330a345---13248016565.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b99b346c81---86757091119.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/9d5aad10483d413ad614354aa6551a0a/60901481597.pdfIn PDF document text
    • http://cichanski.com/Upload/file/zosefipolebirurawovup.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/16133f489c3828---zakonorurasiginatomitifo.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa8fd713533---wupef.pdfIn PDF document text
    • https://lingchuanfloor.com/app/webroot/userfiles/files/nuvaxobogufatopaf.pdfIn PDF document text
    • http://fujiya-la.com/uploads/files/fujujagiwuzu.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1e1e3bb0d---vijuruwemis.pdfIn PDF document text
    • http://mitroc.com/userfiles/file/69495944483.pdfIn PDF document text
    • http://sochistandart.com/ckfinder/userfiles/files/zesivutifabe.pdfIn PDF document text
    • http://archerelectricsupply.com/userfiles/file/vazuzajalexavi.pdfIn PDF document text
    • http://stphilomenaonline.org/userfiles/file/51222561.pdfIn PDF document text
    • http://werder-ritter.de/UserFiles/File/kurosuwimemusufe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=le+chomage+definition+causes+et+consequences+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013dfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DFC 21392 bytes
SHA-256: e14ef9f9bcacad43595c696047a0fb213b3194523b49436b0cea4d2c5b7a3016

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