Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbe4b42aa69874bd…

MALICIOUS

PDF

88.7 KB Created: 2021-07-28 07:32:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b169d797cb7db5e4136bc6bc2f2f0f4d SHA-1: 4ed4c0949c4987524c1db254b100607af36b5149 SHA-256: bbe4b42aa69874bd99de1fd924b07e66550f986d33466523a59cf74ac0d6d856
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress upload directories and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of numerous external URIs and the 'SEO_DISPOSABLE_LINK_FARM' heuristic indicate a phishing or spamming campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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 https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/b8074jp1khs6ef53d0e860ldaj/zuvoja.pdf In PDF document text
    • https://rpitrade.com/ckfinder/userfiles/files/72066290202.pdfIn PDF document text
    • http://itineraire-consulting.com/ckfinder/userfiles/files/repagadulajovo.pdfIn PDF document text
    • http://leadershipcareer.kr/fckeditor/_upload/file/49285310383.pdfIn PDF document text
    • http://praguetransfer.com/files/file/bomulomujepudox.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d22a85c10bd---79411856037.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/bd3jsco4lv47tmv26gtfh808cp/mojexomisikabuwewoledaki.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc6128996b---pozukawonuwibajumilaxujab.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/16075797449934---95307920124.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/dopemaxutafosijut.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/coiuuj6k2uh9mne8bufe7n04p6/55644369747.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/zolazetowozugiramavad.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b8c2238a3ef---97367541993.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/0n9b0njt099ueluc8d6rbgl1j4/90325208777.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16096e823a9751---pibibobiwuzopemoxov.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/1df0544284dd2e2569a0ab5eb5916c32/75213245496.pdfIn PDF document text
    • http://argyler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160788b0da027f---rajerugololigix.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/5627792182.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/sclpi0bb48p91p4g927puap4v5/27042328762.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/e94971f157e75e622c755d6fa1bb3581/kozegorev.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c154d369b34---pulen.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/f01bde56db54b403aa2a369083afa24e/fukafedudafakoteboxejow.pdfIn PDF document text
    • https://artenika.pl/fck/file/wulipumepawezozamisarabuz.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/93232679848.pdfIn PDF document text
    • https://dcmheavyequipment.com/admin/images/file/ririxel.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+pair+altice+remote+to+cable+boxPDF 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_off0000f671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF671 17444 bytes
SHA-256: b1ec9be564d121a2c39c766724d1f519de6e70d9213cc19b24179f67eed7df53
font_01_sfnt_off0001246c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1246C 10584 bytes
SHA-256: eb07674b51a09a528652e77e60b58a365b35d79dcf3bc7f6a5ff3cd36167acf1
font_02_sfnt_off00013c6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C6A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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