Malicious PDF — malware analysis report

Static analysis result for SHA-256 d06790f682d7fb15…

MALICIOUS

PDF

71.5 KB Created: 2021-09-11 02:48:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e48e7e81fdab231c95167970aa899700 SHA-1: 4f4dca2d1be0be6c7d887fa0c5c701e539b95b05 SHA-256: d06790f682d7fb1554c4f0f7e2f7e4fd16dd8472abd8419459648c7b382ce682
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The document contains a link farm pointing to various URLs, some of which are hosted on compromised WordPress sites, suggesting an attempt to redirect users to malicious content or downloads. The presence of external URIs and link farms indicates a phishing or social engineering attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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 https://thebookonpersonaltransformation.com/FCKeditor/file/80623483396.pdf In PDF document text
    • https://stabiactiv.com/userfiles/file/89603941986.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16131551780778---19581866365.pdfIn PDF document text
    • http://marthomaiticherukole.com/userfiles/file/55113793272.pdfIn PDF document text
    • https://vandolderskb.com/images/usr/xuviruxosofit.pdfIn PDF document text
    • http://jmlukanich.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/91388684813.pdfIn PDF document text
    • http://urgentcarepb.com/userfiles/file/dikinibepezalegowezevonud.pdfIn PDF document text
    • https://expomediainc.com/upload/file/gilevom.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133d942d24ac---puxadudefabok.pdfIn PDF document text
    • http://tbvshungviet.com/upload/files/86789138272.pdfIn PDF document text
    • http://mprime.net/ckfinder/userfiles/files/38224918092.pdfIn PDF document text
    • https://macintosh-szerviz-javitas.nuttydog.hu/ckfinder/userfiles/files/3817920393.pdfIn PDF document text
    • http://tongshengchem.com/ckfinder/userfiles/files/girakorot.pdfIn PDF document text
    • http://speckletrack.com/update/editor/file/24353934009.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/zugarabunokivixaretu.pdfIn PDF document text
    • http://archpiudue.com/userfiles/files/94065974714.pdfIn PDF document text
    • https://christianklein.eu/Quansis/ckfinder/userfiles/files/94358491435.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/e90ebc83724d66a494ab5ee02edadb58/98820832817.pdfIn PDF document text
    • http://xinghui.co/upload/ckimg/files/202109032142426202.pdfIn PDF document text
    • https://lekkermooi.nl/userfiles/file/getiwopi.pdfIn PDF document text
    • http://coutleelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/97822112630.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=iptv+smarters+download+apkPDF 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_off0000b538.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB538 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cd4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD4F 10656 bytes
SHA-256: 8eea6183d4e4e054039df04f5069e4f2c48661657f431fe8407763cc93f00bde
font_02_sfnt_off0000e5c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C9 16536 bytes
SHA-256: 2570c20fe2fe77524a52c446d20bdf7cd91a8351b8b01f6fb56de3c3df7e096f