Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e0a958a5a9319fa…

MALICIOUS

PDF

93.9 KB Created: 2021-09-12 13:24:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 0009b5bfcdcd748aafa929d401ca4633 SHA-1: 76b9bd64250e09ee64bd7385f2b1be5e1705be00 SHA-256: 0e0a958a5a9319fab7730761bbca4b9e5de0dc9682bea40820e0d9b42cbea106
134 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm PDF with a deceptive download button, suggesting a phishing or malware distribution tactic. Numerous external PDF links were found, many hosted on potentially disposable domains, further supporting this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://personnelstrategies.net/userfiles/file/5637573589.pdf In PDF document text
    • http://etcpremium.com/userfiles/files/88422140921.pdfIn PDF document text
    • http://netflor.pl/upload/File/siwexam.pdfIn PDF document text
    • https://vyaspublicschool.com/ckfinder/userfiles/files/70184111475.pdfIn PDF document text
    • https://dalnoboy.com/data/filestorage/upload/files/baditugofudavuresipikiba.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/pojubuwavugifolupa.pdfIn PDF document text
    • https://basealimentare.it/webroot/files/fck_uploads/File/batowamu.pdfIn PDF document text
    • https://southernwashpros.com/nbloom/fckuploads/file/xupimibejefakebipagulego.pdfIn PDF document text
    • https://serpavenger.com/ckfinder/userfiles/files/jumokugareli.pdfIn PDF document text
    • https://virker-ikke.dk/files/sebiso.pdfIn PDF document text
    • http://phongkhamtamthan.net/uploadeditor/files/fesovunewaluzubavu.pdfIn PDF document text
    • http://solentpodiatry.com/jackvl940/web/content/images_uploaded/file/jovuvadetikolek.pdfIn PDF document text
    • http://gernano.eu/gfx/userfiles/files/28549755516.pdfIn PDF document text
    • http://gorsilawfirm.com/userfiles/file/67525485470.pdfIn PDF document text
    • http://rentbucharest.net/images/userfiles/11439185237.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/50265361966.pdfIn PDF document text
    • https://nepalonetours.com/userfiles/files/653413364.pdfIn PDF document text
    • http://naplesredeals.com/userfiles/files/befitewu.pdfIn PDF document text
    • http://3e3i.com/UserFiles/file///bisibim.pdfIn PDF document text
    • http://netart.hu/userfiles/file/dolaponipixi.pdfIn PDF document text
    • http://zulassung4you.de/bilder/file/83213442883.pdfIn PDF document text
    • https://strategieb2b.ca/userfiles/file/52211170639.pdfIn PDF document text
    • https://barcelonamedicalcenter.com/files/galeria/files/desum.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=welcome+to+new+york+movie+download+720pPDF 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_off000101c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C3 20568 bytes
SHA-256: ec8fcf1c54615892e6e43ffbc5137d9af414d0e05939fb4bffceb908aa6db3bb
font_01_sfnt_off0001378e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1378E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014fa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FA5 11152 bytes
SHA-256: 1e26fa468930ba7f2ee68fb1500cb0155d13b6e50485e56b145b3c6d9fa2bfd4