Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cc7d33802bdb73d…

MALICIOUS

PDF

92.4 KB Created: 2021-10-07 06:54:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 5f5f326648abf1411bc41cd4f70a0fa9 SHA-1: 5f2fa8bf01947f91aff54d32a2cf7d8bc8086834 SHA-256: 1cc7d33802bdb73d98d6563dcb37780a52ce1d80320b924a590da12d3b915517
126 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan delivery mechanism. It contains numerous embedded URLs, many of which point to disposable domains or are structured as link farms, indicating an attempt to redirect users to potentially harmful sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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://www.parquesanalbertohurtado.cl/ckfinder/userfiles/files/55747431227.pdf In PDF document text
    • https://peoplesmodelinternational.com/ckfinder/userfiles/files/nosesunujamowat.pdfIn PDF document text
    • http://stphilomenaonline.org/userfiles/file/terisufediziwipadomuf.pdfIn PDF document text
    • https://kermoulin.com/userfiles/file/24232743693.pdfIn PDF document text
    • http://pillshop.ru/uimg/files/71655808182.pdfIn PDF document text
    • http://mrs724.ir/basefile/drtiketcom/files/45242626822.pdfIn PDF document text
    • http://cukorbetegshop.hu/files/gigukabukomowunimudodiwo.pdfIn PDF document text
    • http://neoneophytou.com/ckfinder/userfiles/files/nojudonafa.pdfIn PDF document text
    • http://cgl.lu/userfiles/files/36490482354.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1615d094a8a84b---6062389725.pdfIn PDF document text
    • http://pro-elec.ru/ckfinder/userfiles/files/kakanelovojuvinomogu.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/161375f90d5a83---87568667234.pdfIn PDF document text
    • http://lepal.sk/ckfinder/userfiles/files/gavetubevijal.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=is+honey+good+for+you+to+eatPDF 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_off000104c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C5 18580 bytes
SHA-256: fc8d8ae61bb96c9bed048d7e3bb892b039d5c08d3e079ac41d55ec5b4342332f
font_01_sfnt_off0001347b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1347B 10660 bytes
SHA-256: f49f146a6fc274097e7aa6dd940b65bfc8d4ce1df4bc10dfeea9f5bec4a15dae
font_02_sfnt_off00014cb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CB1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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