Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecd659b125b491bd…

MALICIOUS

PDF

39.0 KB Created: 2020-03-15 04:00:29 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: cea491cc928731b4301e68c5e0979656 SHA-1: 23fe030ac13177dd282ed501e814f4b5287a57ce SHA-256: ecd659b125b491bd7daa101eb28f6be14efbacb438563b073b97e0a883825311
104 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a link farm, containing numerous external URLs that likely lead to malicious content. The heuristic 'PDF_SEO_LINK_FARM' specifically indicates a mass of external PDF links, suggesting an attempt to distribute malware or redirect users to phishing sites. The ML classifier also strongly flagged this PDF as malicious, reinforcing the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://she169.brdge.org/uploads/1/3/0/5/130588698/130588698.html#chemdraw+pro+11.+0 PDF link annotation
    • http://www.galdramenn.com/uploads/1/3/0/3/130313641/runilevunivajew.pdfIn PDF document text
    • http://webdisk.windyhillacresinn.com/uploads/1/3/0/9/130968976/469475.pdfIn PDF document text
    • http://protopgranite.com/uploads/1/3/0/2/130270894/gunufe_dogulowabusa.pdfIn PDF document text
    • http://remodelacion.org/uploads/1/3/0/9/130969806/vebubamoxosixugo.pdfIn PDF document text
    • http://www.worldwaternews.com/uploads/1/3/0/6/130604903/xijevakidogoju-novune.pdfIn PDF document text
    • http://fluencybuilders.net/uploads/1/3/0/3/130313081/8b78eccec9645.pdfIn PDF document text
    • http://healingcrystalenergies.com/uploads/1/3/0/4/130435988/zaxubu.pdfIn PDF document text
    • http://urbanfoundation.at/uploads/1/3/0/4/130436299/deluxokurifa_gerexuvabiza_pofufunob.pdfIn PDF document text
    • http://freebetdirectory.com/uploads/1/3/0/5/130550953/fd9bee2b811815.pdfIn PDF document text
    • http://mytriangleofsuccess.com/uploads/1/3/0/7/130739983/520931.pdfIn PDF document text
    • http://beasthoopsatx.com/uploads/1/3/0/2/130287871/f66f1c.pdfIn PDF document text
    • http://theyearsbestwedding.com/uploads/1/3/0/5/130538986/pugupage_sunewuxowewi_jugivalituni_ruwujemixam.pdfIn PDF document text
    • http://www.mrcampbellsmathclass.com/uploads/1/3/0/7/130738945/854cea136ff726.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6634 8492 bytes
SHA-256: f01dc44ca12cb595239e241df9e23f3d9e46c9607b169da895375738287d09e2
font_01_sfnt_off0000866e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x866E 1708 bytes
SHA-256: 83459e82cebe561b9e65dda6a09953c9e35f75e5df0fa62a624e1833cc5b8086

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