Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5b24cbbbb477c4a…

MALICIOUS

PDF

69.2 KB Created: 2021-09-18 06:00:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2aeccfacfe9998662ffe784c83f0f67b SHA-1: 6e9ad654aaf43141d3fd36d770cada8ccb45f6c3 SHA-256: d5b24cbbbb477c4ab24ee67e8c103a861aac5697754cd479493f6820fa26cfe6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan payload. It contains a link farm pointing to various domains, some of which are hosted on compromised CMS uploads or disposable hosting, suggesting an attempt to distribute malware or phish for credentials. The presence of embedded URLs and the nature of the heuristics strongly suggest a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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
  • 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://watchimport.eu/userfiles/file/gapajotodofiv.pdf In PDF document text
    • http://tyextractor.com/d/files/11235062959.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/db7796795d17bccb4a36fbd8b18b299f/nulenopewovofadunubidat.pdfIn PDF document text
    • http://hyunbulsa.org/~ewedd2/userfiles/file/gumuxesumojirabegogadu.pdfIn PDF document text
    • http://damosushipleasanthill.com/uploads/files/34661103371.pdfIn PDF document text
    • https://1snrpaulista.com.br/ckfinder/userfiles/files/lukubatafo.pdfIn PDF document text
    • http://partnerplus30.ru/images/fornews/files/ropamoverimowoxosasupul.pdfIn PDF document text
    • https://www.jnvhardoi.org/ckfinder/userfiles/files/63848340284.pdfIn PDF document text
    • http://3gr-group.com/ci/userfiles/files/jukolaru.pdfIn PDF document text
    • http://yigang-lin.com/uploads/files/202109141047187306.pdfIn PDF document text
    • http://www.ecostroyservis.ru/File/36913472598.pdfIn PDF document text
    • http://jyy.jp/ckfinder/userfiles/files/20210918_004706.pdfIn PDF document text
    • http://xn--9n2bn9mz3aba29g44r4o0a.kr/fckeditor/userfiles/image/pikexobovekejimuvuxibaw.pdfIn PDF document text
    • http://kmbb.at/userfiles/file/18393819549.pdfIn PDF document text
    • http://suliaox.com/v15/Upload/file/20219131649298405.pdfIn PDF document text
    • http://twozonechickenlasvegas.com/uploads/files/64370768517.pdfIn PDF document text
    • https://weddingitaly.jp/images/file/99463188430.pdfIn PDF document text
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/16054590502.pdfIn PDF document text
    • http://fmmvn.net/userfiles/files/24550883390.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/12746141539.pdfIn PDF document text
    • http://h-st.nl/bestanden/files/7671649426.pdfIn PDF document text
    • https://topclassgreenery.nl/images/file/zidapamujowa.pdfIn PDF document text
    • http://pkynfe.net/userfiles/file/44739970625.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16137de1c6f20e---kogesamoxumopagugef.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/6ce8f378eadd7d0715a699afe0f9d82c/51439992149.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=android+play+downloadPDF 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_off0000b405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB405 14336 bytes
SHA-256: b62da2956a4131d57084976ba991a382f6d16598ff749153290a65edfdfc041b
font_01_sfnt_off0000d819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD819 10168 bytes
SHA-256: 03330e8478e9388bbeff9954fd402cc1f6c81a90b27bf1477741cab53b081cde
font_02_sfnt_off0000eeef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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